{
  "manageEntity": {
    "action": "Save",
    "entityId": "1225779747",
    "entityType": "Track",
    "nonce": "0x4cd32c148e9899b105460693721068d69705bd0ccd498695d12c61df1966e856",
    "signature": "0x1cb88f8b98b7519ae94a60ddd80cf96cc063f1d47dbd7c5632d60173ee3ec82205be2fb54226310d6e7f43a867de4f5df909edbde3ee39825a70ba433bdc89e41b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}