{
  "manageEntity": {
    "action": "Save",
    "entityId": "370407",
    "entityType": "Track",
    "nonce": "0x40030d3db8b170e69203518839dbe70d6000960521305fee501604eaa6cbf42d",
    "signature": "0xd6f5475c67c9e7b41d6eb6a8c2493ce0d56a19847bc933fc68380d35fba506a249c589810aae7e59148596e6a5bbf451730d4930f676b2d2ec2c349e526d96d01c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}