{
  "manageEntity": {
    "action": "Save",
    "entityId": "989219315",
    "entityType": "Track",
    "nonce": "0x5acfe7b6053aff77f91405ea87090f33ca42eb7604560369db15f2e36623e07e",
    "signature": "0x77f690561c6acbb3db84af2fb52fc7eb6cb84b759dce09d260f3ce6f5b7b091c49fb2c69b710cee5131cf67f5a05a921545f0c9834ff4292cefed151956f038c1c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}