{
  "manageEntity": {
    "action": "Save",
    "entityId": "843987554",
    "entityType": "Track",
    "nonce": "0xe45c193addbe85aff3528baa41c32f739305781895b587dcc39b17d1518809fe",
    "signature": "0x37ed66f1c566ef6a6932ed11c0b2da284e1494e14e645886c6b8d687509cdda57c24138f2b4a883fbd3ec1466246fd80afa35a159386652c835e8eed76bff3b51b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}