{ "721": { "collection_policy_id": { "assetnamewithoutspecialchars": { "name": "Display Name", "image":"ipfs://cid", "mediaType": "image/png", "single_trait_key": "single_trait_value", "plural_trait_key": [ "plural_trait_value_1", "plural_trait_value_2" ], "object_trait_key": { "object_single_trait_key": "object_single_trait_value", "object_plural_trait_key": [ "object_plural_trait_value_1", "object_plural_trait_value_2" ] }, "other_data": "same_rules_as_trait_keys_and_values", "extended": ["https://www.example.com/offchaindata"], "files": [{ "name": "File name", "mediaType": "image/png", "src": "ipfs://cid or array" }] } } } }