{
  "manageEntity": {
    "action": "Save",
    "entityId": "684240754",
    "entityType": "Track",
    "nonce": "0x1a11f789033179b2fbc7a43f75061905d27c0063c08267bd355a5c8401433384",
    "signature": "0xd932aad520940eccc79c5df0f446b00d75928b613086a5b6a4062aae698ba3c564cf13d07bad63bf696b297c12acb97be9546d0749a6b52bb2ecf9f433249c3e1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}