{
  "manageEntity": {
    "action": "Save",
    "entityId": "1014963",
    "entityType": "Track",
    "nonce": "0x8150cc4b7aed6176d9e9365a257c85678f86fc3c34f79f8c422faa593e5d342f",
    "signature": "0x2fc239703057f2433c192931663494f20134dad563e064586a6c859d0bb271784bfcab63815cbf8aa148edeaf6cf293a186476a02de0bab7409ec935bef0904f1b",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}