{
  "manageEntity": {
    "action": "Save",
    "entityId": "767814042",
    "entityType": "Track",
    "nonce": "0x9b981a760814a588d9258a1932674e9c27c1fd21db94dd481e369ca136e17732",
    "signature": "0xfb4e3cb4cfe93e7b1d99438cf7583729535e37fd9eaf2516e10e6269bcf3f57e45d46879756fb5019a8c88ad3e42e549193cc93a7826dbe8c6a51ad8d2ae27701b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}