{
  "manageEntity": {
    "action": "Save",
    "entityId": "302988",
    "entityType": "Track",
    "nonce": "0xb2ccba545d3c733e320ae01ac0659f745c3c791f6eeb4b69a484f0bf6d4271a4",
    "signature": "0x46c4827c0f965aeacbda082c7dd9fa93f130ed5593aca168232bfc84c4fdcafa2baa90f620acc308af10625baea7603c756ed6b4c7bb4c183b3f411b3b5f0c601b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}