{
  "manageEntity": {
    "action": "Save",
    "entityId": "1466404253",
    "entityType": "Track",
    "nonce": "0x3e9c18211d9bf90ef4191faad971e889ee235e56544fd0907fab7d521e3626a9",
    "signature": "0xe1bb20579b0b0c897accb9e0f7b39979f59429026c2d05f8c4bbec8633eb19d320a63e7b667a0f9afe20c9d1d4e2b364ec2777fb111091e322fc6cbf9d47845f1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}