{
  "manageEntity": {
    "action": "Save",
    "entityId": "2023188469",
    "entityType": "Track",
    "nonce": "0xcf21e22c90c7cfbf1d7e2746ddc23bb7ee5afee147c147930465c854439d0e18",
    "signature": "0x6303df20d660636762f3ae33a23b88e82886e154bb01d4c5677a37ccac3caaea13e326db9db907a01324bfd294bae7d550d7519e36de1b4c65ccc9aa0c169e0c1c",
    "signer": "0x879cE855712D48b8193205E59eF0bC730Ed8aEf7",
    "userId": "1957708"
  }
}