diff --git a/schema/active_symbols.go b/schema/active_symbols.go
index 26c0a4b..8704fe6 100644
--- a/schema/active_symbols.go
+++ b/schema/active_symbols.go
@@ -22,7 +22,7 @@ type ActiveSymbols struct {
 	LandingCompanyShort *ActiveSymbolsLandingCompanyShort `json:"landing_company_short,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough ActiveSymbolsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] If you specify this field, only symbols that can be traded through
@@ -163,7 +163,7 @@ const ActiveSymbolsLandingCompanyVirtual ActiveSymbolsLandingCompany = "virtual"
 const ActiveSymbolsLandingCompanySvg ActiveSymbolsLandingCompany = "svg"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type ActiveSymbolsPassthrough map[string]interface{}
 
 type ActiveSymbolsProductType string
diff --git a/schema/api_token.go b/schema/api_token.go
index d42239a..87b89ce 100644
--- a/schema/api_token.go
+++ b/schema/api_token.go
@@ -21,7 +21,7 @@ type ApiToken struct {
 	NewTokenScopes []ApiTokenNewTokenScopesElem `json:"new_token_scopes,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough ApiTokenPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -43,7 +43,7 @@ const ApiTokenNewTokenScopesElemTrade ApiTokenNewTokenScopesElem = "trade"
 const ApiTokenNewTokenScopesElemTradingInformation ApiTokenNewTokenScopesElem = "trading_information"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type ApiTokenPassthrough map[string]interface{}
 
 type ApiTokenValidForCurrentIpOnly int
diff --git a/schema/app_delete.go b/schema/app_delete.go
index 7150600..09d0649 100644
--- a/schema/app_delete.go
+++ b/schema/app_delete.go
@@ -11,7 +11,7 @@ type AppDelete struct {
 	AppDelete int `json:"app_delete"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough AppDeletePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -19,7 +19,7 @@ type AppDelete struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type AppDeletePassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/app_get.go b/schema/app_get.go
index e2df245..4cd9443 100644
--- a/schema/app_get.go
+++ b/schema/app_get.go
@@ -11,7 +11,7 @@ type AppGet struct {
 	AppGet int `json:"app_get"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough AppGetPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -19,7 +19,7 @@ type AppGet struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type AppGetPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/app_list.go b/schema/app_list.go
index 87b0013..f09717e 100644
--- a/schema/app_list.go
+++ b/schema/app_list.go
@@ -38,7 +38,7 @@ type AppList struct {
 	AppList AppListAppList `json:"app_list"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough AppListPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -46,7 +46,7 @@ type AppList struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type AppListPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/app_markup_details.go b/schema/app_markup_details.go
index 693f861..120776b 100644
--- a/schema/app_markup_details.go
+++ b/schema/app_markup_details.go
@@ -33,7 +33,7 @@ type AppMarkupDetails struct {
 	Offset *int `json:"offset,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough AppMarkupDetailsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -53,7 +53,7 @@ type AppMarkupDetailsAppMarkupDetails int
 type AppMarkupDetailsDescription int
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type AppMarkupDetailsPassthrough map[string]interface{}
 
 type AppMarkupDetailsSort string
diff --git a/schema/app_markup_statistics.go b/schema/app_markup_statistics.go
index f1649f8..5a15e47 100644
--- a/schema/app_markup_statistics.go
+++ b/schema/app_markup_statistics.go
@@ -44,7 +44,7 @@ type AppMarkupStatistics struct {
 	DateTo string `json:"date_to"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough AppMarkupStatisticsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -52,7 +52,7 @@ type AppMarkupStatistics struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type AppMarkupStatisticsPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/app_register.go b/schema/app_register.go
index 04bbf72..daf1821 100644
--- a/schema/app_register.go
+++ b/schema/app_register.go
@@ -49,7 +49,7 @@ func (j *AppRegisterAppRegister) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type AppRegisterPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
@@ -101,7 +101,7 @@ type AppRegister struct {
 	Name string `json:"name"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough AppRegisterPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] The URL to redirect to after a successful login. Required if
diff --git a/schema/app_update.go b/schema/app_update.go
index f67d3b2..baeb208 100644
--- a/schema/app_update.go
+++ b/schema/app_update.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type AppUpdatePassthrough map[string]interface{}
 
 type AppUpdateScopesElem string
@@ -65,7 +65,7 @@ type AppUpdate struct {
 	Name string `json:"name"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough AppUpdatePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] The URL to redirect to after a successful login. Required if
diff --git a/schema/asset_index.go b/schema/asset_index.go
index 05d3f3d..0336cbe 100644
--- a/schema/asset_index.go
+++ b/schema/asset_index.go
@@ -21,7 +21,7 @@ type AssetIndex struct {
 	LandingCompanyShort *AssetIndexLandingCompanyShort `json:"landing_company_short,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough AssetIndexPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -137,7 +137,7 @@ const AssetIndexLandingCompanyVanuatu AssetIndexLandingCompany = "vanuatu"
 const AssetIndexLandingCompanyVirtual AssetIndexLandingCompany = "virtual"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type AssetIndexPassthrough map[string]interface{}
 
 var enumValues_AssetIndexAssetIndex = []interface{}{
diff --git a/schema/authorize.go b/schema/authorize.go
index 7839175..a70b7ae 100644
--- a/schema/authorize.go
+++ b/schema/authorize.go
@@ -46,7 +46,7 @@ type Authorize struct {
 	Authorize string `json:"authorize"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough AuthorizePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -54,7 +54,7 @@ type Authorize struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type AuthorizePassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/balance.go b/schema/balance.go
index 38484be..543d575 100644
--- a/schema/balance.go
+++ b/schema/balance.go
@@ -33,7 +33,7 @@ func (j *BalanceBalance) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type BalancePassthrough map[string]interface{}
 
 type BalanceSubscribe int
@@ -74,7 +74,7 @@ type Balance struct {
 	Balance BalanceBalance `json:"balance"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough BalancePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/buy.go b/schema/buy.go
index 3342d48..253467a 100644
--- a/schema/buy.go
+++ b/schema/buy.go
@@ -16,7 +16,7 @@ type Buy struct {
 	Parameters *BuyParameters `json:"parameters,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough BuyPassthrough `json:"passthrough,omitempty"`
 
 	// Maximum price at which to purchase the contract.
@@ -367,7 +367,7 @@ func (j *BuyParameters) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type BuyPassthrough map[string]interface{}
 
 type BuySubscribe int
diff --git a/schema/buy_contract_for_multiple_accounts.go b/schema/buy_contract_for_multiple_accounts.go
index 6b807f7..bf320e7 100644
--- a/schema/buy_contract_for_multiple_accounts.go
+++ b/schema/buy_contract_for_multiple_accounts.go
@@ -18,7 +18,7 @@ type BuyContractForMultipleAccounts struct {
 	Parameters *BuyContractForMultipleAccountsParameters `json:"parameters,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough BuyContractForMultipleAccountsPassthrough `json:"passthrough,omitempty"`
 
 	// Maximum price at which to purchase the contract.
@@ -277,7 +277,7 @@ func (j *BuyContractForMultipleAccountsParameters) UnmarshalJSON(b []byte) error
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type BuyContractForMultipleAccountsPassthrough map[string]interface{}
 
 var enumValues_BuyContractForMultipleAccountsParametersBasis = []interface{}{
diff --git a/schema/cancel.go b/schema/cancel.go
index bf1dedc..14760bd 100644
--- a/schema/cancel.go
+++ b/schema/cancel.go
@@ -11,7 +11,7 @@ type Cancel struct {
 	Cancel int `json:"cancel"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough CancelPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -19,7 +19,7 @@ type Cancel struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type CancelPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/cashier.go b/schema/cashier.go
index 273f1c4..92369cd 100644
--- a/schema/cashier.go
+++ b/schema/cashier.go
@@ -22,7 +22,7 @@ type Cashier struct {
 	DryRun CashierDryRun `json:"dry_run,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough CashierPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Cashier provider. `crypto` will be default option for crypto
@@ -49,7 +49,7 @@ const CashierCashierWithdraw CashierCashier = "withdraw"
 type CashierDryRun int
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type CashierPassthrough map[string]interface{}
 
 type CashierProvider string
diff --git a/schema/contract_update.go b/schema/contract_update.go
index 9c9f6a1..407ed61 100644
--- a/schema/contract_update.go
+++ b/schema/contract_update.go
@@ -44,7 +44,7 @@ type ContractUpdate struct {
 	LimitOrder ContractUpdateLimitOrder `json:"limit_order"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough ContractUpdatePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -61,7 +61,7 @@ type ContractUpdateLimitOrder struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type ContractUpdatePassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/contract_update_history.go b/schema/contract_update_history.go
index 75e0a5c..f7d332a 100644
--- a/schema/contract_update_history.go
+++ b/schema/contract_update_history.go
@@ -44,7 +44,7 @@ type ContractUpdateHistory struct {
 	Limit float64 `json:"limit,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough ContractUpdateHistoryPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -52,7 +52,7 @@ type ContractUpdateHistory struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type ContractUpdateHistoryPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/contracts_for.go b/schema/contracts_for.go
index d292802..27f9ff7 100644
--- a/schema/contracts_for.go
+++ b/schema/contracts_for.go
@@ -26,7 +26,7 @@ type ContractsFor struct {
 	LandingCompanyShort ContractsForLandingCompanyShort `json:"landing_company_short,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough ContractsForPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] If you specify this field, only contracts tradable through that
@@ -112,7 +112,7 @@ const ContractsForLandingCompanySvg ContractsForLandingCompany = "svg"
 const ContractsForLandingCompanyVirtual ContractsForLandingCompany = "virtual"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type ContractsForPassthrough map[string]interface{}
 
 type ContractsForProductType string
diff --git a/schema/copy_start.go b/schema/copy_start.go
index 0bafb35..6f17c30 100644
--- a/schema/copy_start.go
+++ b/schema/copy_start.go
@@ -20,7 +20,7 @@ type CopyStart struct {
 	MinTradeStake *float64 `json:"min_trade_stake,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough CopyStartPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -31,7 +31,7 @@ type CopyStart struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type CopyStartPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/copy_stop.go b/schema/copy_stop.go
index abf9209..5a3f05a 100644
--- a/schema/copy_stop.go
+++ b/schema/copy_stop.go
@@ -11,7 +11,7 @@ type CopyStop struct {
 	CopyStop string `json:"copy_stop"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough CopyStopPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -19,7 +19,7 @@ type CopyStop struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type CopyStopPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/copytrading_list.go b/schema/copytrading_list.go
index b57bab4..9c974aa 100644
--- a/schema/copytrading_list.go
+++ b/schema/copytrading_list.go
@@ -38,7 +38,7 @@ type CopytradingList struct {
 	CopytradingList CopytradingListCopytradingList `json:"copytrading_list"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough CopytradingListPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -46,7 +46,7 @@ type CopytradingList struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type CopytradingListPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/copytrading_statistics.go b/schema/copytrading_statistics.go
index 22be363..932504d 100644
--- a/schema/copytrading_statistics.go
+++ b/schema/copytrading_statistics.go
@@ -38,7 +38,7 @@ type CopytradingStatistics struct {
 	CopytradingStatistics CopytradingStatisticsCopytradingStatistics `json:"copytrading_statistics"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough CopytradingStatisticsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -49,7 +49,7 @@ type CopytradingStatistics struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type CopytradingStatisticsPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/crypto_config.go b/schema/crypto_config.go
index 0b387e8..9c1796c 100644
--- a/schema/crypto_config.go
+++ b/schema/crypto_config.go
@@ -42,7 +42,7 @@ type CryptoConfig struct {
 	CurrencyCode *string `json:"currency_code,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough CryptoConfigPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -50,7 +50,7 @@ type CryptoConfig struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type CryptoConfigPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/document_upload.go b/schema/document_upload.go
index 4dc390d..16f25de 100644
--- a/schema/document_upload.go
+++ b/schema/document_upload.go
@@ -43,7 +43,7 @@ type DocumentUpload struct {
 	PageType *DocumentUploadPageType `json:"page_type,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough DocumentUploadPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] It contains info about the proof of ownership being uploaded
@@ -267,7 +267,7 @@ const DocumentUploadPageTypeBack DocumentUploadPageType = "back"
 const DocumentUploadPageTypePhoto DocumentUploadPageType = "photo"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type DocumentUploadPassthrough map[string]interface{}
 
 // A collection of unspecific information related to the proof of ownership being
diff --git a/schema/economic_calendar.go b/schema/economic_calendar.go
index 0c6aabe..fd4ee9c 100644
--- a/schema/economic_calendar.go
+++ b/schema/economic_calendar.go
@@ -46,7 +46,7 @@ type EconomicCalendar struct {
 	EndDate *int `json:"end_date,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough EconomicCalendarPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -57,7 +57,7 @@ type EconomicCalendar struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type EconomicCalendarPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/exchange_rates.go b/schema/exchange_rates.go
index d5af357..4c99e28 100644
--- a/schema/exchange_rates.go
+++ b/schema/exchange_rates.go
@@ -33,7 +33,7 @@ func (j *ExchangeRatesExchangeRates) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type ExchangeRatesPassthrough map[string]interface{}
 
 type ExchangeRatesSubscribe int
@@ -72,7 +72,7 @@ type ExchangeRates struct {
 	ExchangeRates ExchangeRatesExchangeRates `json:"exchange_rates"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough ExchangeRatesPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/forget.go b/schema/forget.go
index e0b145e..960da50 100644
--- a/schema/forget.go
+++ b/schema/forget.go
@@ -11,7 +11,7 @@ type Forget struct {
 	Forget string `json:"forget"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough ForgetPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -19,7 +19,7 @@ type Forget struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type ForgetPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/forget_all.go b/schema/forget_all.go
index 2fd5336..663c47a 100644
--- a/schema/forget_all.go
+++ b/schema/forget_all.go
@@ -13,7 +13,7 @@ type ForgetAll struct {
 	ForgetAll interface{} `json:"forget_all"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough ForgetAllPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -21,7 +21,7 @@ type ForgetAll struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type ForgetAllPassthrough map[string]interface{}
 
 type StreamTypes string
diff --git a/schema/get_account_status.go b/schema/get_account_status.go
index 4978728..db38aec 100644
--- a/schema/get_account_status.go
+++ b/schema/get_account_status.go
@@ -38,7 +38,7 @@ type GetAccountStatus struct {
 	GetAccountStatus GetAccountStatusGetAccountStatus `json:"get_account_status"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough GetAccountStatusPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -46,7 +46,7 @@ type GetAccountStatus struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type GetAccountStatusPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/get_financial_assessment.go b/schema/get_financial_assessment.go
index 7d33424..ff6d7a6 100644
--- a/schema/get_financial_assessment.go
+++ b/schema/get_financial_assessment.go
@@ -40,7 +40,7 @@ type GetFinancialAssessment struct {
 	GetFinancialAssessment GetFinancialAssessmentGetFinancialAssessment `json:"get_financial_assessment"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough GetFinancialAssessmentPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -48,7 +48,7 @@ type GetFinancialAssessment struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type GetFinancialAssessmentPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/get_limits.go b/schema/get_limits.go
index 4a75714..e1af094 100644
--- a/schema/get_limits.go
+++ b/schema/get_limits.go
@@ -38,7 +38,7 @@ type GetLimits struct {
 	GetLimits GetLimitsGetLimits `json:"get_limits"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough GetLimitsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -46,7 +46,7 @@ type GetLimits struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type GetLimitsPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/get_self_exclusion.go b/schema/get_self_exclusion.go
index 35a8c87..a7b69a8 100644
--- a/schema/get_self_exclusion.go
+++ b/schema/get_self_exclusion.go
@@ -40,7 +40,7 @@ type GetSelfExclusion struct {
 	GetSelfExclusion GetSelfExclusionGetSelfExclusion `json:"get_self_exclusion"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough GetSelfExclusionPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -48,7 +48,7 @@ type GetSelfExclusion struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type GetSelfExclusionPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/get_settings.go b/schema/get_settings.go
index b6d0bd7..ee97a66 100644
--- a/schema/get_settings.go
+++ b/schema/get_settings.go
@@ -38,7 +38,7 @@ type GetSettings struct {
 	GetSettings GetSettingsGetSettings `json:"get_settings"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough GetSettingsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -46,7 +46,7 @@ type GetSettings struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type GetSettingsPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/identity_verification_document_add.go b/schema/identity_verification_document_add.go
index c0264a2..430f35e 100644
--- a/schema/identity_verification_document_add.go
+++ b/schema/identity_verification_document_add.go
@@ -52,7 +52,7 @@ type IdentityVerificationDocumentAdd struct {
 	IssuingCountry string `json:"issuing_country"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough IdentityVerificationDocumentAddPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -60,7 +60,7 @@ type IdentityVerificationDocumentAdd struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type IdentityVerificationDocumentAddPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/landing_company.go b/schema/landing_company.go
index b7fccc6..fd778ae 100644
--- a/schema/landing_company.go
+++ b/schema/landing_company.go
@@ -15,7 +15,7 @@ type LandingCompany struct {
 	LandingCompany string `json:"landing_company"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough LandingCompanyPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -23,7 +23,7 @@ type LandingCompany struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type LandingCompanyPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/landing_company_details.go b/schema/landing_company_details.go
index c6da387..0b7cf33 100644
--- a/schema/landing_company_details.go
+++ b/schema/landing_company_details.go
@@ -19,7 +19,7 @@ type LandingCompanyDetails struct {
 	LandingCompanyDetails LandingCompanyDetailsLandingCompanyDetails `json:"landing_company_details"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough LandingCompanyDetailsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -63,7 +63,7 @@ func (j *LandingCompanyDetailsLandingCompanyDetails) UnmarshalJSON(b []byte) err
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type LandingCompanyDetailsPassthrough map[string]interface{}
 
 var enumValues_LandingCompanyDetailsLandingCompanyDetails = []interface{}{
diff --git a/schema/login_history.go b/schema/login_history.go
index b94ae69..c7bcb1a 100644
--- a/schema/login_history.go
+++ b/schema/login_history.go
@@ -41,7 +41,7 @@ type LoginHistory struct {
 	LoginHistory LoginHistoryLoginHistory `json:"login_history"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough LoginHistoryPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -49,7 +49,7 @@ type LoginHistory struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type LoginHistoryPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/logout.go b/schema/logout.go
index f79a50f..99f8ea2 100644
--- a/schema/logout.go
+++ b/schema/logout.go
@@ -38,7 +38,7 @@ type Logout struct {
 	Logout LogoutLogout `json:"logout"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough LogoutPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -46,7 +46,7 @@ type Logout struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type LogoutPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/mt5_deposit.go b/schema/mt5_deposit.go
index 05b3db3..97064ed 100644
--- a/schema/mt5_deposit.go
+++ b/schema/mt5_deposit.go
@@ -45,7 +45,7 @@ type Mt5Deposit struct {
 	Mt5Deposit Mt5DepositMt5Deposit `json:"mt5_deposit"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough Mt5DepositPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -56,7 +56,7 @@ type Mt5Deposit struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type Mt5DepositPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/mt5_get_settings.go b/schema/mt5_get_settings.go
index d9929ba..b4752c3 100644
--- a/schema/mt5_get_settings.go
+++ b/schema/mt5_get_settings.go
@@ -41,7 +41,7 @@ type Mt5GetSettings struct {
 	Mt5GetSettings Mt5GetSettingsMt5GetSettings `json:"mt5_get_settings"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough Mt5GetSettingsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -49,7 +49,7 @@ type Mt5GetSettings struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type Mt5GetSettingsPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/mt5_login_list.go b/schema/mt5_login_list.go
index dfc1ea3..2bfca74 100644
--- a/schema/mt5_login_list.go
+++ b/schema/mt5_login_list.go
@@ -38,7 +38,7 @@ type Mt5LoginList struct {
 	Mt5LoginList Mt5LoginListMt5LoginList `json:"mt5_login_list"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough Mt5LoginListPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -46,7 +46,7 @@ type Mt5LoginList struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type Mt5LoginListPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/mt5_new_account.go b/schema/mt5_new_account.go
index a8d9992..958b458 100644
--- a/schema/mt5_new_account.go
+++ b/schema/mt5_new_account.go
@@ -67,7 +67,7 @@ type Mt5NewAccount struct {
 	Name string `json:"name"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough Mt5NewAccountPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] User's phone number.
@@ -115,7 +115,7 @@ const Mt5NewAccountMt5AccountTypeFinancialStp Mt5NewAccountMt5AccountType = "fin
 type Mt5NewAccountMt5NewAccount int
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type Mt5NewAccountPassthrough map[string]interface{}
 
 type Mt5NewAccountServer string
diff --git a/schema/mt5_password_change.go b/schema/mt5_password_change.go
index d24054f..bb7ff2b 100644
--- a/schema/mt5_password_change.go
+++ b/schema/mt5_password_change.go
@@ -33,7 +33,7 @@ func (j *Mt5PasswordChangeMt5PasswordChange) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type Mt5PasswordChangePassthrough map[string]interface{}
 
 type Mt5PasswordChangePasswordType string
@@ -81,7 +81,7 @@ type Mt5PasswordChange struct {
 	OldPassword string `json:"old_password"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough Mt5PasswordChangePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Type of the password to change.
diff --git a/schema/mt5_password_check.go b/schema/mt5_password_check.go
index 08e5b05..e23524f 100644
--- a/schema/mt5_password_check.go
+++ b/schema/mt5_password_check.go
@@ -33,7 +33,7 @@ func (j *Mt5PasswordCheckMt5PasswordCheck) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type Mt5PasswordCheckPassthrough map[string]interface{}
 
 type Mt5PasswordCheckPasswordType string
@@ -72,7 +72,7 @@ type Mt5PasswordCheck struct {
 	Mt5PasswordCheck Mt5PasswordCheckMt5PasswordCheck `json:"mt5_password_check"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough Mt5PasswordCheckPassthrough `json:"passthrough,omitempty"`
 
 	// The password of the account.
diff --git a/schema/mt5_password_reset.go b/schema/mt5_password_reset.go
index ae2bac9..9dceac2 100644
--- a/schema/mt5_password_reset.go
+++ b/schema/mt5_password_reset.go
@@ -33,7 +33,7 @@ func (j *Mt5PasswordResetMt5PasswordReset) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type Mt5PasswordResetPassthrough map[string]interface{}
 
 type Mt5PasswordResetPasswordType string
@@ -77,7 +77,7 @@ type Mt5PasswordReset struct {
 	NewPassword string `json:"new_password"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough Mt5PasswordResetPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Type of the password to reset.
diff --git a/schema/mt5_withdrawal.go b/schema/mt5_withdrawal.go
index 066a018..f423b0e 100644
--- a/schema/mt5_withdrawal.go
+++ b/schema/mt5_withdrawal.go
@@ -45,7 +45,7 @@ type Mt5Withdrawal struct {
 	Mt5Withdrawal Mt5WithdrawalMt5Withdrawal `json:"mt5_withdrawal"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough Mt5WithdrawalPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -56,7 +56,7 @@ type Mt5Withdrawal struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type Mt5WithdrawalPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/new_account_maltainvest.go b/schema/new_account_maltainvest.go
index 440c459..d724d2f 100644
--- a/schema/new_account_maltainvest.go
+++ b/schema/new_account_maltainvest.go
@@ -107,7 +107,7 @@ type NewAccountMaltainvest struct {
 	Occupation *NewAccountMaltainvestOccupation `json:"occupation,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough NewAccountMaltainvestPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Starting with `+` followed by 9-35 digits, hyphens or space.
@@ -294,7 +294,7 @@ const NewAccountMaltainvestOccupationStudents NewAccountMaltainvestOccupation =
 const NewAccountMaltainvestOccupationUnemployed NewAccountMaltainvestOccupation = "Unemployed"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type NewAccountMaltainvestPassthrough map[string]interface{}
 
 type NewAccountMaltainvestRequiredInitialMargin string
diff --git a/schema/new_account_real.go b/schema/new_account_real.go
index bb2b2a3..7f9abfe 100644
--- a/schema/new_account_real.go
+++ b/schema/new_account_real.go
@@ -135,7 +135,7 @@ type NewAccountReal struct {
 	NonPepDeclaration *int `json:"non_pep_declaration,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough NewAccountRealPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Starting with `+` followed by 9-35 digits, hyphens or space.
@@ -258,7 +258,7 @@ func (j *NewAccountRealClientType) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type NewAccountRealPassthrough map[string]interface{}
 
 type NewAccountRealNewAccountReal int
diff --git a/schema/new_account_virtual.go b/schema/new_account_virtual.go
index a637c42..b32c217 100644
--- a/schema/new_account_virtual.go
+++ b/schema/new_account_virtual.go
@@ -30,7 +30,7 @@ type NewAccountVirtual struct {
 	NewAccountVirtual NewAccountVirtualNewAccountVirtual `json:"new_account_virtual"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough NewAccountVirtualPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -104,7 +104,7 @@ type NewAccountVirtualEmailConsent int
 type NewAccountVirtualNewAccountVirtual int
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type NewAccountVirtualPassthrough map[string]interface{}
 
 type NewAccountVirtualSignupDevice string
diff --git a/schema/oauth_apps.go b/schema/oauth_apps.go
index 254ed00..a2d507c 100644
--- a/schema/oauth_apps.go
+++ b/schema/oauth_apps.go
@@ -38,7 +38,7 @@ type OauthApps struct {
 	OauthApps OauthAppsOauthApps `json:"oauth_apps"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough OauthAppsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -46,7 +46,7 @@ type OauthApps struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type OauthAppsPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/p2p_advert_create.go b/schema/p2p_advert_create.go
index ec5b181..3bba6ba 100644
--- a/schema/p2p_advert_create.go
+++ b/schema/p2p_advert_create.go
@@ -37,7 +37,7 @@ type P2PAdvertCreate struct {
 	P2PAdvertCreate P2PAdvertCreateP2PAdvertCreate `json:"p2p_advert_create"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PAdvertCreatePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Payment instructions.
@@ -75,7 +75,7 @@ type P2PAdvertCreateBlockTrade int
 type P2PAdvertCreateP2PAdvertCreate int
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PAdvertCreatePassthrough map[string]interface{}
 
 type P2PAdvertCreateRateType string
diff --git a/schema/p2p_advert_info.go b/schema/p2p_advert_info.go
index 08ce06a..344bf91 100644
--- a/schema/p2p_advert_info.go
+++ b/schema/p2p_advert_info.go
@@ -33,7 +33,7 @@ func (j *P2PAdvertInfoP2PAdvertInfo) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PAdvertInfoPassthrough map[string]interface{}
 
 type P2PAdvertInfoSubscribe int
@@ -99,7 +99,7 @@ type P2PAdvertInfo struct {
 	P2PAdvertInfo P2PAdvertInfoP2PAdvertInfo `json:"p2p_advert_info"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PAdvertInfoPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/p2p_advert_list.go b/schema/p2p_advert_list.go
index 052419e..62e37b1 100644
--- a/schema/p2p_advert_list.go
+++ b/schema/p2p_advert_list.go
@@ -41,7 +41,7 @@ type P2PAdvertList struct {
 	P2PAdvertList P2PAdvertListP2PAdvertList `json:"p2p_advert_list"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PAdvertListPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Search by supported payment methods.
@@ -70,7 +70,7 @@ type P2PAdvertListFavouritesOnly int
 type P2PAdvertListP2PAdvertList int
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PAdvertListPassthrough map[string]interface{}
 
 type P2PAdvertListSortBy string
diff --git a/schema/p2p_advert_update.go b/schema/p2p_advert_update.go
index 5008818..6e0481e 100644
--- a/schema/p2p_advert_update.go
+++ b/schema/p2p_advert_update.go
@@ -33,7 +33,7 @@ type P2PAdvertUpdateDelete int
 type P2PAdvertUpdateIsActive int
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PAdvertUpdatePassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
@@ -135,7 +135,7 @@ type P2PAdvertUpdate struct {
 	P2PAdvertUpdate P2PAdvertUpdateP2PAdvertUpdate `json:"p2p_advert_update"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PAdvertUpdatePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Payment instructions.
diff --git a/schema/p2p_advertiser_adverts.go b/schema/p2p_advertiser_adverts.go
index 258a116..660a3cf 100644
--- a/schema/p2p_advertiser_adverts.go
+++ b/schema/p2p_advertiser_adverts.go
@@ -47,7 +47,7 @@ type P2PAdvertiserAdverts struct {
 	P2PAdvertiserAdverts P2PAdvertiserAdvertsP2PAdvertiserAdverts `json:"p2p_advertiser_adverts"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PAdvertiserAdvertsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -55,7 +55,7 @@ type P2PAdvertiserAdverts struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PAdvertiserAdvertsPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/p2p_advertiser_create.go b/schema/p2p_advertiser_create.go
index 866f845..339fc84 100644
--- a/schema/p2p_advertiser_create.go
+++ b/schema/p2p_advertiser_create.go
@@ -33,7 +33,7 @@ func (j *P2PAdvertiserCreateP2PAdvertiserCreate) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PAdvertiserCreatePassthrough map[string]interface{}
 
 type P2PAdvertiserCreateSubscribe int
@@ -79,7 +79,7 @@ type P2PAdvertiserCreate struct {
 	P2PAdvertiserCreate P2PAdvertiserCreateP2PAdvertiserCreate `json:"p2p_advertiser_create"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PAdvertiserCreatePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Advertiser's payment information, to be used as a default for new
diff --git a/schema/p2p_advertiser_info.go b/schema/p2p_advertiser_info.go
index 37f8a67..468abe8 100644
--- a/schema/p2p_advertiser_info.go
+++ b/schema/p2p_advertiser_info.go
@@ -33,7 +33,7 @@ func (j *P2PAdvertiserInfoP2PAdvertiserInfo) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PAdvertiserInfoPassthrough map[string]interface{}
 
 type P2PAdvertiserInfoSubscribe int
@@ -72,7 +72,7 @@ type P2PAdvertiserInfo struct {
 	P2PAdvertiserInfo P2PAdvertiserInfoP2PAdvertiserInfo `json:"p2p_advertiser_info"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PAdvertiserInfoPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/p2p_advertiser_list.go b/schema/p2p_advertiser_list.go
index 659d453..b57dba3 100644
--- a/schema/p2p_advertiser_list.go
+++ b/schema/p2p_advertiser_list.go
@@ -24,7 +24,7 @@ type P2PAdvertiserList struct {
 	P2PAdvertiserList P2PAdvertiserListP2PAdvertiserList `json:"p2p_advertiser_list"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PAdvertiserListPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -42,7 +42,7 @@ type P2PAdvertiserListIsBlocked int
 type P2PAdvertiserListP2PAdvertiserList int
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PAdvertiserListPassthrough map[string]interface{}
 
 type P2PAdvertiserListSortBy string
diff --git a/schema/p2p_advertiser_payment_methods.go b/schema/p2p_advertiser_payment_methods.go
index 3aa9ab5..e7aa335 100644
--- a/schema/p2p_advertiser_payment_methods.go
+++ b/schema/p2p_advertiser_payment_methods.go
@@ -67,7 +67,7 @@ type P2PAdvertiserPaymentMethods struct {
 	P2PAdvertiserPaymentMethods P2PAdvertiserPaymentMethodsP2PAdvertiserPaymentMethods `json:"p2p_advertiser_payment_methods"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PAdvertiserPaymentMethodsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -78,7 +78,7 @@ type P2PAdvertiserPaymentMethods struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PAdvertiserPaymentMethodsPassthrough map[string]interface{}
 
 // Contains payment methods to update.
diff --git a/schema/p2p_advertiser_relations.go b/schema/p2p_advertiser_relations.go
index 4fe9f0c..cc75d89 100644
--- a/schema/p2p_advertiser_relations.go
+++ b/schema/p2p_advertiser_relations.go
@@ -44,7 +44,7 @@ type P2PAdvertiserRelations struct {
 	P2PAdvertiserRelations P2PAdvertiserRelationsP2PAdvertiserRelations `json:"p2p_advertiser_relations"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PAdvertiserRelationsPassthrough `json:"passthrough,omitempty"`
 
 	// IDs of advertisers to remove from blocked.
@@ -58,7 +58,7 @@ type P2PAdvertiserRelations struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PAdvertiserRelationsPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/p2p_advertiser_update.go b/schema/p2p_advertiser_update.go
index 3b8bade..c04568c 100644
--- a/schema/p2p_advertiser_update.go
+++ b/schema/p2p_advertiser_update.go
@@ -60,7 +60,7 @@ func (j *P2PAdvertiserUpdateP2PAdvertiserUpdate) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PAdvertiserUpdatePassthrough map[string]interface{}
 
 type P2PAdvertiserUpdateShowName int
@@ -136,7 +136,7 @@ type P2PAdvertiserUpdate struct {
 	P2PAdvertiserUpdate P2PAdvertiserUpdateP2PAdvertiserUpdate `json:"p2p_advertiser_update"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PAdvertiserUpdatePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Advertiser's payment information, to be used as a default for new
diff --git a/schema/p2p_chat_create.go b/schema/p2p_chat_create.go
index 1e1ef47..73e47a8 100644
--- a/schema/p2p_chat_create.go
+++ b/schema/p2p_chat_create.go
@@ -41,7 +41,7 @@ type P2PChatCreate struct {
 	P2PChatCreate P2PChatCreateP2PChatCreate `json:"p2p_chat_create"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PChatCreatePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -49,7 +49,7 @@ type P2PChatCreate struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PChatCreatePassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/p2p_order_cancel.go b/schema/p2p_order_cancel.go
index 779379a..011e5d7 100644
--- a/schema/p2p_order_cancel.go
+++ b/schema/p2p_order_cancel.go
@@ -41,7 +41,7 @@ type P2POrderCancel struct {
 	P2POrderCancel P2POrderCancelP2POrderCancel `json:"p2p_order_cancel"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2POrderCancelPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -49,7 +49,7 @@ type P2POrderCancel struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2POrderCancelPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/p2p_order_confirm.go b/schema/p2p_order_confirm.go
index b8bf8a7..f42c3fc 100644
--- a/schema/p2p_order_confirm.go
+++ b/schema/p2p_order_confirm.go
@@ -71,7 +71,7 @@ type P2POrderConfirm struct {
 	P2POrderConfirm P2POrderConfirmP2POrderConfirm `json:"p2p_order_confirm"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2POrderConfirmPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -82,7 +82,7 @@ type P2POrderConfirm struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2POrderConfirmPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/p2p_order_create.go b/schema/p2p_order_create.go
index ae57e47..749a9f6 100644
--- a/schema/p2p_order_create.go
+++ b/schema/p2p_order_create.go
@@ -33,7 +33,7 @@ func (j *P2POrderCreateP2POrderCreate) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2POrderCreatePassthrough map[string]interface{}
 
 type P2POrderCreateSubscribe int
@@ -77,7 +77,7 @@ type P2POrderCreate struct {
 	P2POrderCreate P2POrderCreateP2POrderCreate `json:"p2p_order_create"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2POrderCreatePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Payment instructions, only applicable for sell orders.
diff --git a/schema/p2p_order_dispute.go b/schema/p2p_order_dispute.go
index 6a5f733..7f9cc5b 100644
--- a/schema/p2p_order_dispute.go
+++ b/schema/p2p_order_dispute.go
@@ -18,7 +18,7 @@ type P2POrderDispute struct {
 	P2POrderDispute P2POrderDisputeP2POrderDispute `json:"p2p_order_dispute"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2POrderDisputePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -80,7 +80,7 @@ func (j *P2POrderDisputeP2POrderDispute) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2POrderDisputePassthrough map[string]interface{}
 
 var enumValues_P2POrderDisputeDisputeReason = []interface{}{
diff --git a/schema/p2p_order_info.go b/schema/p2p_order_info.go
index 954956a..13d3af1 100644
--- a/schema/p2p_order_info.go
+++ b/schema/p2p_order_info.go
@@ -33,7 +33,7 @@ func (j *P2POrderInfoP2POrderInfo) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2POrderInfoPassthrough map[string]interface{}
 
 type P2POrderInfoSubscribe int
@@ -71,7 +71,7 @@ type P2POrderInfo struct {
 	P2POrderInfo P2POrderInfoP2POrderInfo `json:"p2p_order_info"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2POrderInfoPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/p2p_order_list.go b/schema/p2p_order_list.go
index 5b56756..53b143f 100644
--- a/schema/p2p_order_list.go
+++ b/schema/p2p_order_list.go
@@ -60,7 +60,7 @@ func (j *P2POrderListP2POrderList) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2POrderListPassthrough map[string]interface{}
 
 type P2POrderListSubscribe int
@@ -107,7 +107,7 @@ type P2POrderList struct {
 	P2POrderList P2POrderListP2POrderList `json:"p2p_order_list"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2POrderListPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/p2p_order_review.go b/schema/p2p_order_review.go
index 3e8ab16..d369d56 100644
--- a/schema/p2p_order_review.go
+++ b/schema/p2p_order_review.go
@@ -33,7 +33,7 @@ func (j *P2POrderReviewP2POrderReview) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2POrderReviewPassthrough map[string]interface{}
 
 type P2POrderReviewRecommended struct {
@@ -82,7 +82,7 @@ type P2POrderReview struct {
 	P2POrderReview P2POrderReviewP2POrderReview `json:"p2p_order_review"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2POrderReviewPassthrough `json:"passthrough,omitempty"`
 
 	// Rating for the transaction, 1 to 5.
diff --git a/schema/p2p_payment_methods.go b/schema/p2p_payment_methods.go
index d7018a5..785cef9 100644
--- a/schema/p2p_payment_methods.go
+++ b/schema/p2p_payment_methods.go
@@ -38,7 +38,7 @@ type P2PPaymentMethods struct {
 	P2PPaymentMethods P2PPaymentMethodsP2PPaymentMethods `json:"p2p_payment_methods"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PPaymentMethodsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -46,7 +46,7 @@ type P2PPaymentMethods struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PPaymentMethodsPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/p2p_ping.go b/schema/p2p_ping.go
index b5aac40..8b85a11 100644
--- a/schema/p2p_ping.go
+++ b/schema/p2p_ping.go
@@ -39,7 +39,7 @@ type P2PPing struct {
 	P2PPing P2PPingP2PPing `json:"p2p_ping"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough P2PPingPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -47,7 +47,7 @@ type P2PPing struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type P2PPingPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/payment_methods.go b/schema/payment_methods.go
index 8982732..ef2d8ec 100644
--- a/schema/payment_methods.go
+++ b/schema/payment_methods.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type PaymentMethodsPassthrough map[string]interface{}
 
 type PaymentMethodsPaymentMethods int
@@ -43,7 +43,7 @@ type PaymentMethods struct {
 	Country *string `json:"country,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough PaymentMethodsPassthrough `json:"passthrough,omitempty"`
 
 	// Must be `1`
diff --git a/schema/paymentagent_create.go b/schema/paymentagent_create.go
index 0f9b80b..8d9b7ff 100644
--- a/schema/paymentagent_create.go
+++ b/schema/paymentagent_create.go
@@ -33,7 +33,7 @@ func (j *PaymentagentCreateCodeOfConductApproval) UnmarshalJSON(b []byte) error
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type PaymentagentCreatePassthrough map[string]interface{}
 
 type PaymentagentCreatePaymentagentCreate int
@@ -152,7 +152,7 @@ type PaymentagentCreate struct {
 	Information string `json:"information"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough PaymentagentCreatePassthrough `json:"passthrough,omitempty"`
 
 	// The name with which the payment agent is going to be identified.
diff --git a/schema/paymentagent_details.go b/schema/paymentagent_details.go
index f3e64de..979bd6b 100644
--- a/schema/paymentagent_details.go
+++ b/schema/paymentagent_details.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type PaymentagentDetailsPassthrough map[string]interface{}
 
 type PaymentagentDetailsPaymentagentDetails int
@@ -39,7 +39,7 @@ func (j *PaymentagentDetailsPaymentagentDetails) UnmarshalJSON(b []byte) error {
 // Gets client's payment agent details.
 type PaymentagentDetails struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough PaymentagentDetailsPassthrough `json:"passthrough,omitempty"`
 
 	// Must be 1
diff --git a/schema/paymentagent_list.go b/schema/paymentagent_list.go
index a34ec77..a2d13d2 100644
--- a/schema/paymentagent_list.go
+++ b/schema/paymentagent_list.go
@@ -14,7 +14,7 @@ type PaymentagentList struct {
 	Currency *string `json:"currency,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough PaymentagentListPassthrough `json:"passthrough,omitempty"`
 
 	// Client's 2-letter country code (obtained from `residence_list` call).
@@ -25,7 +25,7 @@ type PaymentagentList struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type PaymentagentListPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/paymentagent_transfer.go b/schema/paymentagent_transfer.go
index b1129ff..6e36335 100644
--- a/schema/paymentagent_transfer.go
+++ b/schema/paymentagent_transfer.go
@@ -34,7 +34,7 @@ func (j *PaymentagentTransferDryRun) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type PaymentagentTransferPassthrough map[string]interface{}
 
 type PaymentagentTransferPaymentagentTransfer int
@@ -79,7 +79,7 @@ type PaymentagentTransfer struct {
 	DryRun *PaymentagentTransferDryRun `json:"dry_run,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough PaymentagentTransferPassthrough `json:"passthrough,omitempty"`
 
 	// Must be `1`
diff --git a/schema/paymentagent_withdraw.go b/schema/paymentagent_withdraw.go
index 12c68d0..8506b55 100644
--- a/schema/paymentagent_withdraw.go
+++ b/schema/paymentagent_withdraw.go
@@ -34,7 +34,7 @@ func (j *PaymentagentWithdrawDryRun) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type PaymentagentWithdrawPassthrough map[string]interface{}
 
 type PaymentagentWithdrawPaymentagentWithdraw int
@@ -79,7 +79,7 @@ type PaymentagentWithdraw struct {
 	DryRun *PaymentagentWithdrawDryRun `json:"dry_run,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough PaymentagentWithdrawPassthrough `json:"passthrough,omitempty"`
 
 	// The payment agent loginid received from the `paymentagent_list` call.
diff --git a/schema/paymentagent_withdraw_justification.go b/schema/paymentagent_withdraw_justification.go
index 7881802..7c63637 100644
--- a/schema/paymentagent_withdraw_justification.go
+++ b/schema/paymentagent_withdraw_justification.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type PaymentagentWithdrawJustificationPassthrough map[string]interface{}
 
 type PaymentagentWithdrawJustificationPaymentagentWithdrawJustification int
@@ -42,7 +42,7 @@ type PaymentagentWithdrawJustification struct {
 	Message *string `json:"message,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough PaymentagentWithdrawJustificationPassthrough `json:"passthrough,omitempty"`
 
 	// Must be `1`
diff --git a/schema/payout_currencies.go b/schema/payout_currencies.go
index 0589198..078767c 100644
--- a/schema/payout_currencies.go
+++ b/schema/payout_currencies.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type PayoutCurrenciesPassthrough map[string]interface{}
 
 type PayoutCurrenciesPayoutCurrencies int
@@ -40,7 +40,7 @@ func (j *PayoutCurrenciesPayoutCurrencies) UnmarshalJSON(b []byte) error {
 // only the currencies available for the account will be returned.
 type PayoutCurrencies struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough PayoutCurrenciesPassthrough `json:"passthrough,omitempty"`
 
 	// Must be `1`
diff --git a/schema/ping.go b/schema/ping.go
index 1e39778..b42e0ae 100644
--- a/schema/ping.go
+++ b/schema/ping.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type PingPassthrough map[string]interface{}
 
 type PingPing int
@@ -40,7 +40,7 @@ func (j *PingPing) UnmarshalJSON(b []byte) error {
 // keep it alive.
 type Ping struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough PingPassthrough `json:"passthrough,omitempty"`
 
 	// Must be `1`
diff --git a/schema/portfolio.go b/schema/portfolio.go
index 4ad33b7..dcf550f 100644
--- a/schema/portfolio.go
+++ b/schema/portfolio.go
@@ -12,7 +12,7 @@ type Portfolio struct {
 	ContractType []PortfolioContractTypeElem `json:"contract_type,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough PortfolioPassthrough `json:"passthrough,omitempty"`
 
 	// Must be `1`
@@ -84,7 +84,7 @@ const PortfolioContractTypeElemVANILLALONGCALL PortfolioContractTypeElem = "VANI
 const PortfolioContractTypeElemVANILLALONGPUT PortfolioContractTypeElem = "VANILLALONGPUT"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type PortfolioPassthrough map[string]interface{}
 
 type PortfolioPortfolio int
diff --git a/schema/profit_table.go b/schema/profit_table.go
index 9378bb2..dce6dcc 100644
--- a/schema/profit_table.go
+++ b/schema/profit_table.go
@@ -27,7 +27,7 @@ type ProfitTable struct {
 	Offset *int `json:"offset,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough ProfitTablePassthrough `json:"passthrough,omitempty"`
 
 	// Must be `1`
@@ -84,7 +84,7 @@ const ProfitTableContractTypeElemVANILLALONGPUT ProfitTableContractTypeElem = "V
 type ProfitTableDescription int
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type ProfitTablePassthrough map[string]interface{}
 
 type ProfitTableProfitTable int
diff --git a/schema/proposal.go b/schema/proposal.go
index f8c11d1..544edcf 100644
--- a/schema/proposal.go
+++ b/schema/proposal.go
@@ -68,7 +68,7 @@ type Proposal struct {
 	Multiplier *float64 `json:"multiplier,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough ProposalPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] The product type.
@@ -173,7 +173,7 @@ type ProposalLimitOrder struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type ProposalPassthrough map[string]interface{}
 
 type ProposalProductType string
diff --git a/schema/proposal_open_contract.go b/schema/proposal_open_contract.go
index 828b5d5..996df44 100644
--- a/schema/proposal_open_contract.go
+++ b/schema/proposal_open_contract.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type ProposalOpenContractPassthrough map[string]interface{}
 
 type ProposalOpenContractProposalOpenContract int
@@ -69,7 +69,7 @@ type ProposalOpenContract struct {
 	ContractId *int `json:"contract_id,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough ProposalOpenContractPassthrough `json:"passthrough,omitempty"`
 
 	// Must be `1`
diff --git a/schema/reality_check.go b/schema/reality_check.go
index 0d777e6..caa91a3 100644
--- a/schema/reality_check.go
+++ b/schema/reality_check.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type RealityCheckPassthrough map[string]interface{}
 
 type RealityCheckRealityCheck int
@@ -42,7 +42,7 @@ func (j *RealityCheckRealityCheck) UnmarshalJSON(b []byte) error {
 // requirement for certain landing companies.
 type RealityCheck struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough RealityCheckPassthrough `json:"passthrough,omitempty"`
 
 	// Must be `1`
diff --git a/schema/residence_list.go b/schema/residence_list.go
index dee2141..ebb21a1 100644
--- a/schema/residence_list.go
+++ b/schema/residence_list.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type ResidenceListPassthrough map[string]interface{}
 
 type ResidenceListResidenceList int
@@ -40,7 +40,7 @@ func (j *ResidenceListResidenceList) UnmarshalJSON(b []byte) error {
 // populating the account opening form.
 type ResidenceList struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough ResidenceListPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/revoke_oauth_app.go b/schema/revoke_oauth_app.go
index 588cf1c..2fe24f8 100644
--- a/schema/revoke_oauth_app.go
+++ b/schema/revoke_oauth_app.go
@@ -8,7 +8,7 @@ import "encoding/json"
 // Used for revoking access of particular app.
 type RevokeOauthApp struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough RevokeOauthAppPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -19,7 +19,7 @@ type RevokeOauthApp struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type RevokeOauthAppPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/sell.go b/schema/sell.go
index b454e1a..564ba49 100644
--- a/schema/sell.go
+++ b/schema/sell.go
@@ -8,7 +8,7 @@ import "encoding/json"
 // Sell a Contract as identified from a previous `portfolio` call.
 type Sell struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough SellPassthrough `json:"passthrough,omitempty"`
 
 	// Minimum price at which to sell the contract, or `0` for 'sell at market'.
@@ -22,7 +22,7 @@ type Sell struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type SellPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/sell_contract_for_multiple_accounts.go b/schema/sell_contract_for_multiple_accounts.go
index f29837e..91b9cdd 100644
--- a/schema/sell_contract_for_multiple_accounts.go
+++ b/schema/sell_contract_for_multiple_accounts.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type SellContractForMultipleAccountsPassthrough map[string]interface{}
 
 type SellContractForMultipleAccountsSellContractForMultipleAccounts int
@@ -44,7 +44,7 @@ func (j *SellContractForMultipleAccountsSellContractForMultipleAccounts) Unmarsh
 // token for the current account.
 type SellContractForMultipleAccounts struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough SellContractForMultipleAccountsPassthrough `json:"passthrough,omitempty"`
 
 	// Minimum price at which to sell the contract, or `0` for 'sell at market'.
diff --git a/schema/sell_expired.go b/schema/sell_expired.go
index 2eeccf1..397035d 100644
--- a/schema/sell_expired.go
+++ b/schema/sell_expired.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type SellExpiredPassthrough map[string]interface{}
 
 type SellExpiredSellExpired int
@@ -40,7 +40,7 @@ func (j *SellExpiredSellExpired) UnmarshalJSON(b []byte) error {
 // contracts.
 type SellExpired struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough SellExpiredPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/set_account_currency.go b/schema/set_account_currency.go
index 2bdd468..d1f4c2a 100644
--- a/schema/set_account_currency.go
+++ b/schema/set_account_currency.go
@@ -10,7 +10,7 @@ import "encoding/json"
 // once, and then can never be changed.
 type SetAccountCurrency struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough SetAccountCurrencyPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -22,7 +22,7 @@ type SetAccountCurrency struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type SetAccountCurrencyPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/set_financial_assessment.go b/schema/set_financial_assessment.go
index 7416ce4..f38a811 100644
--- a/schema/set_financial_assessment.go
+++ b/schema/set_financial_assessment.go
@@ -62,7 +62,7 @@ type SetFinancialAssessment struct {
 	OtherInstrumentsTradingFrequency *SetFinancialAssessmentOtherInstrumentsTradingFrequency `json:"other_instruments_trading_frequency,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough SetFinancialAssessmentPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -336,7 +336,7 @@ const SetFinancialAssessmentOtherInstrumentsTradingFrequencyA40TransactionsOrMor
 const SetFinancialAssessmentOtherInstrumentsTradingFrequencyA610TransactionsInThePast12Months SetFinancialAssessmentOtherInstrumentsTradingFrequency = "6-10 transactions in the past 12 months"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type SetFinancialAssessmentPassthrough map[string]interface{}
 
 type SetFinancialAssessmentSetFinancialAssessment int
diff --git a/schema/set_self_exclusion.go b/schema/set_self_exclusion.go
index 9f4410f..c5a0afa 100644
--- a/schema/set_self_exclusion.go
+++ b/schema/set_self_exclusion.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type SetSelfExclusionPassthrough map[string]interface{}
 
 type SetSelfExclusionSetSelfExclusion int
@@ -78,7 +78,7 @@ type SetSelfExclusion struct {
 	MaxTurnover interface{} `json:"max_turnover,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough SetSelfExclusionPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/set_settings.go b/schema/set_settings.go
index b069518..1347baf 100644
--- a/schema/set_settings.go
+++ b/schema/set_settings.go
@@ -373,7 +373,7 @@ var enumValues_SetSettingsTradingHub = []interface{}{
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type SetSettingsPassthrough map[string]interface{}
 
 // Set User Settings (this call should be used in conjunction with `get_settings`)
@@ -445,7 +445,7 @@ type SetSettings struct {
 	NonPepDeclaration *SetSettingsNonPepDeclaration `json:"non_pep_declaration,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough SetSettingsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Note: not applicable for virtual account. Starting with `+` followed
diff --git a/schema/statement.go b/schema/statement.go
index 03c27b2..42b8ca4 100644
--- a/schema/statement.go
+++ b/schema/statement.go
@@ -27,7 +27,7 @@ type Statement struct {
 	Offset *int `json:"offset,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough StatementPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -96,7 +96,7 @@ func (j *StatementDescription) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type StatementPassthrough map[string]interface{}
 
 type StatementStatement int
diff --git a/schema/states_list.go b/schema/states_list.go
index 5dc06c8..9200b02 100644
--- a/schema/states_list.go
+++ b/schema/states_list.go
@@ -9,7 +9,7 @@ import "encoding/json"
 // populate the account opening form.
 type StatesList struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough StatesListPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -20,7 +20,7 @@ type StatesList struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type StatesListPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/ticks.go b/schema/ticks.go
index 6148864..5b1e814 100644
--- a/schema/ticks.go
+++ b/schema/ticks.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type TicksPassthrough map[string]interface{}
 
 type TicksSubscribe int
@@ -39,7 +39,7 @@ func (j *TicksSubscribe) UnmarshalJSON(b []byte) error {
 // Initiate a continuous stream of spot price updates for a given symbol.
 type Ticks struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough TicksPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/ticks_history.go b/schema/ticks_history.go
index 0983a1f..25e6a61 100644
--- a/schema/ticks_history.go
+++ b/schema/ticks_history.go
@@ -24,7 +24,7 @@ type TicksHistory struct {
 	Granularity *TicksHistoryGranularity `json:"granularity,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough TicksHistoryPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -52,7 +52,7 @@ type TicksHistoryAdjustStartTime int
 type TicksHistoryGranularity int
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type TicksHistoryPassthrough map[string]interface{}
 
 type TicksHistoryStyle string
diff --git a/schema/time.go b/schema/time.go
index 5f86bec..c0d61bb 100644
--- a/schema/time.go
+++ b/schema/time.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type TimePassthrough map[string]interface{}
 
 type TimeTime int
@@ -39,7 +39,7 @@ func (j *TimeTime) UnmarshalJSON(b []byte) error {
 // Request back-end server epoch time.
 type Time struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough TimePassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/tnc_approval.go b/schema/tnc_approval.go
index 070350d..8277296 100644
--- a/schema/tnc_approval.go
+++ b/schema/tnc_approval.go
@@ -33,7 +33,7 @@ func (j *TncApprovalAffiliateCocAgreement) UnmarshalJSON(b []byte) error {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type TncApprovalPassthrough map[string]interface{}
 
 type TncApprovalTncApproval float64
@@ -94,7 +94,7 @@ type TncApproval struct {
 	AffiliateCocAgreement *TncApprovalAffiliateCocAgreement `json:"affiliate_coc_agreement,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough TncApprovalPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/topup_virtual.go b/schema/topup_virtual.go
index 4acf316..b83fc46 100644
--- a/schema/topup_virtual.go
+++ b/schema/topup_virtual.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type TopupVirtualPassthrough map[string]interface{}
 
 type TopupVirtualTopupVirtual int
@@ -40,7 +40,7 @@ func (j *TopupVirtualTopupVirtual) UnmarshalJSON(b []byte) error {
 // this call.
 type TopupVirtual struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough TopupVirtualPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/trading_durations.go b/schema/trading_durations.go
index be83f23..2d13422 100644
--- a/schema/trading_durations.go
+++ b/schema/trading_durations.go
@@ -18,7 +18,7 @@ type TradingDurations struct {
 	LandingCompanyShort *TradingDurationsLandingCompanyShort `json:"landing_company_short,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough TradingDurationsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -103,7 +103,7 @@ const TradingDurationsLandingCompanySvg TradingDurationsLandingCompany = "svg"
 const TradingDurationsLandingCompanyVirtual TradingDurationsLandingCompany = "virtual"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type TradingDurationsPassthrough map[string]interface{}
 
 type TradingDurationsTradingDurations int
diff --git a/schema/trading_platform_investor_password_reset.go b/schema/trading_platform_investor_password_reset.go
index 6ef5dcf..3acd5c8 100644
--- a/schema/trading_platform_investor_password_reset.go
+++ b/schema/trading_platform_investor_password_reset.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type TradingPlatformInvestorPasswordResetPassthrough map[string]interface{}
 
 type TradingPlatformInvestorPasswordResetPlatform string
@@ -75,7 +75,7 @@ type TradingPlatformInvestorPasswordReset struct {
 	NewPassword string `json:"new_password"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough TradingPlatformInvestorPasswordResetPassthrough `json:"passthrough,omitempty"`
 
 	// Name of trading platform.
diff --git a/schema/trading_platform_password_reset.go b/schema/trading_platform_password_reset.go
index 43cb4db..0c1088e 100644
--- a/schema/trading_platform_password_reset.go
+++ b/schema/trading_platform_password_reset.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type TradingPlatformPasswordResetPassthrough map[string]interface{}
 
 type TradingPlatformPasswordResetPlatform string
@@ -74,7 +74,7 @@ type TradingPlatformPasswordReset struct {
 	NewPassword string `json:"new_password"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough TradingPlatformPasswordResetPassthrough `json:"passthrough,omitempty"`
 
 	// Name of trading platform.
diff --git a/schema/trading_servers.go b/schema/trading_servers.go
index 0bb82ec..c6d543e 100644
--- a/schema/trading_servers.go
+++ b/schema/trading_servers.go
@@ -141,7 +141,7 @@ const TradingServersMarketTypeFinancial TradingServersMarketType = "financial"
 const TradingServersMarketTypeSynthetic TradingServersMarketType = "synthetic"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type TradingServersPassthrough map[string]interface{}
 
 type TradingServersAccountType string
@@ -197,7 +197,7 @@ type TradingServers struct {
 	MarketType TradingServersMarketType `json:"market_type,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough TradingServersPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Pass the trading platform name, default to mt5
diff --git a/schema/trading_times.go b/schema/trading_times.go
index dd87239..80dea3d 100644
--- a/schema/trading_times.go
+++ b/schema/trading_times.go
@@ -8,7 +8,7 @@ import "encoding/json"
 // Receive a list of market opening times for a given date.
 type TradingTimes struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough TradingTimesPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -20,7 +20,7 @@ type TradingTimes struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type TradingTimesPassthrough map[string]interface{}
 
 // UnmarshalJSON implements json.Unmarshaler.
diff --git a/schema/transaction.go b/schema/transaction.go
index 5452419..604cdf3 100644
--- a/schema/transaction.go
+++ b/schema/transaction.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type TransactionPassthrough map[string]interface{}
 
 type TransactionSubscribe int
@@ -65,7 +65,7 @@ func (j *TransactionTransaction) UnmarshalJSON(b []byte) error {
 // Subscribe to transaction notifications
 type Transaction struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough TransactionPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/transfer_between_accounts.go b/schema/transfer_between_accounts.go
index be5bdab..09f985b 100644
--- a/schema/transfer_between_accounts.go
+++ b/schema/transfer_between_accounts.go
@@ -37,7 +37,7 @@ const TransferBetweenAccountsAccountsAll TransferBetweenAccountsAccounts = "all"
 const TransferBetweenAccountsAccountsBrief TransferBetweenAccountsAccounts = "brief"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type TransferBetweenAccountsPassthrough map[string]interface{}
 
 type TransferBetweenAccountsTransferBetweenAccounts int
@@ -89,7 +89,7 @@ type TransferBetweenAccounts struct {
 	Currency *string `json:"currency,omitempty"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough TransferBetweenAccountsPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/unsubscribe_email.go b/schema/unsubscribe_email.go
index bd8ae16..a15e0e1 100644
--- a/schema/unsubscribe_email.go
+++ b/schema/unsubscribe_email.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type UnsubscribeEmailPassthrough map[string]interface{}
 
 type UnsubscribeEmailUnsubscribeEmail int
@@ -45,7 +45,7 @@ type UnsubscribeEmail struct {
 	Checksum string `json:"checksum"`
 
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough UnsubscribeEmailPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
diff --git a/schema/verify_email.go b/schema/verify_email.go
index 0ce3d09..53cc99f 100644
--- a/schema/verify_email.go
+++ b/schema/verify_email.go
@@ -10,7 +10,7 @@ import "encoding/json"
 // the address containing a security code for verification.
 type VerifyEmail struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough VerifyEmailPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -28,7 +28,7 @@ type VerifyEmail struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type VerifyEmailPassthrough map[string]interface{}
 
 type VerifyEmailType string
diff --git a/schema/verify_email_cellxpert.go b/schema/verify_email_cellxpert.go
index dc554c0..4d44ba5 100644
--- a/schema/verify_email_cellxpert.go
+++ b/schema/verify_email_cellxpert.go
@@ -10,7 +10,7 @@ import "encoding/json"
 // address containing a security code for verification.
 type VerifyEmailCellxpert struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough VerifyEmailCellxpertPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.
@@ -27,7 +27,7 @@ type VerifyEmailCellxpert struct {
 }
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type VerifyEmailCellxpertPassthrough map[string]interface{}
 
 type VerifyEmailCellxpertType string
diff --git a/schema/website_status.go b/schema/website_status.go
index f0bb2a0..32ebf68 100644
--- a/schema/website_status.go
+++ b/schema/website_status.go
@@ -7,7 +7,7 @@ import "reflect"
 import "encoding/json"
 
 // [Optional] Used to pass data through the websocket, which may be retrieved via
-// the `echo_req` output field.
+// the `echo_req` output field. Maximum size is 3500 bytes.
 type WebsiteStatusPassthrough map[string]interface{}
 
 type WebsiteStatusSubscribe int
@@ -66,7 +66,7 @@ func (j *WebsiteStatusWebsiteStatus) UnmarshalJSON(b []byte) error {
 // Request server status.
 type WebsiteStatus struct {
 	// [Optional] Used to pass data through the websocket, which may be retrieved via
-	// the `echo_req` output field.
+	// the `echo_req` output field. Maximum size is 3500 bytes.
 	Passthrough WebsiteStatusPassthrough `json:"passthrough,omitempty"`
 
 	// [Optional] Used to map request to response.