{
  "manageEntity": {
    "action": "Save",
    "entityId": "1781304340",
    "entityType": "Track",
    "nonce": "0x44aac188ee88bbdfb76aab6b8ad872f5059f0581255b440da1b6ef46d8659457",
    "signature": "0x7b800ca674330ffd1b76762df722dddfa2abf7c0a4e7c8ac2de1a85a5bf985eb78b53417ca403915636ac9287e55ae81774d6c891d3e6cbd2c31ff8da1369f361b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}