Create statemine-asset-DOTA.json

[DOTADurial]

Signature Auto check (For asset category)

Asset Owner & Signature Account:
<REPLACE THE OWNER>

Data that needs to be signed:
file

Signature Hash: <REPLACE THE SIGNATURE>

Verification (For system|custom|erc20|erc721 category)

Your Identity:
<Team Member | Community Member | Other>

[carlhong]

Please update the signature and file as mentioned in README, you can also refer to this pr