{
  "manageEntity": {
    "action": "Save",
    "entityId": "2085423279",
    "entityType": "Track",
    "nonce": "0x02e0a3c873d8dd72b5d6aee91c22675afc99276c69c35bb897a600a98c0af28d",
    "signature": "0x0440ea0d33d011c454eaa19e9c13b80fa9b6c7eee6ae58d04694d0bfa245d17d589c7b3491bd72695209b4fbae155366c8fd4f0df48f8d2fb201aca20d1c6bee1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}