diff --git a/pkg/api/operation/models.go b/pkg/api/operation/models.go
index 2dbe9f4a..bbd4ec31 100644
--- a/pkg/api/operation/models.go
+++ b/pkg/api/operation/models.go
@@ -6,6 +6,12 @@ SPDX-License-Identifier: Apache-2.0
 
 package operation
 
+// Property contains a key-value pair.
+type Property struct {
+	Key   string
+	Value interface{}
+}
+
 // Operation holds minimum information required for parsing/validating client request.
 type Operation struct {
 
@@ -23,6 +29,9 @@ type Operation struct {
 
 	// AnchorOrigin defines anchor origin.
 	AnchorOrigin interface{}
+
+	// Properties contains an arbitrary set of implementation-specific name-value pairs.
+	Properties []Property
 }
 
 // Reference holds minimum information about did operation (suffix and type).
@@ -90,10 +99,12 @@ const (
 
 // QueuedOperation stores minimum required operation info for operations queue.
 type QueuedOperation struct {
+	Type             Type
 	OperationRequest []byte
 	UniqueSuffix     string
 	Namespace        string
 	AnchorOrigin     interface{}
+	Properties       []Property
 }
 
 // QueuedOperationAtTime contains queued operation info with protocol genesis time.
diff --git a/pkg/batch/cutter/cutter.go b/pkg/batch/cutter/cutter.go
index ca34ca5b..6714431d 100644
--- a/pkg/batch/cutter/cutter.go
+++ b/pkg/batch/cutter/cutter.go
@@ -144,9 +144,11 @@ func getOperationsAtProtocolVersion(opsAtTime []*operation.QueuedOperationAtTime
 
 		ops = append(ops,
 			&operation.QueuedOperation{
+				Type:             op.Type,
 				OperationRequest: op.OperationRequest,
 				UniqueSuffix:     op.UniqueSuffix,
 				Namespace:        op.Namespace,
+				Properties:       op.Properties,
 			},
 		)
 	}
diff --git a/pkg/dochandler/handler.go b/pkg/dochandler/handler.go
index c8bef56a..e2da451d 100644
--- a/pkg/dochandler/handler.go
+++ b/pkg/dochandler/handler.go
@@ -540,10 +540,12 @@ func (r *DocumentHandler) resolveRequestWithInitialState(uniqueSuffix, longFormD
 func (r *DocumentHandler) addToBatch(op *operation.Operation, versionTime uint64) error {
 	return r.writer.Add(
 		&operation.QueuedOperation{
+			Type:             op.Type,
 			Namespace:        r.namespace,
 			UniqueSuffix:     op.UniqueSuffix,
 			OperationRequest: op.OperationRequest,
 			AnchorOrigin:     op.AnchorOrigin,
+			Properties:       op.Properties,
 		}, versionTime)
 }