{
  "manageEntity": {
    "action": "Save",
    "entityId": "844512678",
    "entityType": "Track",
    "nonce": "0xeedeacde1874c8c9c5fb6f51652a3e3f8bd60efd7a5aa70a22d4c1139e694538",
    "signature": "0xc666617b93ed2602650b71a96c92a46e06f175ad2c38a8e897e19a14d04702fe1203d0d942de0d428c0be0c1339b847f34a6d5ff9bc7916020c5823141e9c9701b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}