{
  "manageEntity": {
    "action": "Save",
    "entityId": "1750577938",
    "entityType": "Track",
    "nonce": "0xfa095c003637a5c4586f3b01f373fb90368c6029e3283e3f8c910d1ac10ee058",
    "signature": "0x5345d9739de7119942fe3190e265697e0a520dd5143f35a11cfb2de07b7d33281270c6d792a6f3e37038eabc8056b367940522026c54dd1127b4504c71a2c72d1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}