{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073435898",
    "entityType": "Track",
    "nonce": "0x1cb5bd116749d56a2d51edd3ece4977a85a7110f86fba3387a9a9170aff77323",
    "signature": "0xd2faef2a6bf774fd3631b5109df8b7476fbe6f26d08e4b0ec6747591d774fea4570e9444a73d6080a8ca56d4439291962ec07750b23ad57af0607ddce47252061c",
    "signer": "0x56e1A1DA7e462EAb52B3A45f6605f1bbfe0D1858",
    "userId": "301637"
  }
}