{
  "manageEntity": {
    "action": "Save",
    "entityId": "496686",
    "entityType": "Track",
    "nonce": "0x365cf58f20a67d14c39977c4bd0f6d7f4cd4bfb4927b359d429291daa8eba2be",
    "signature": "0xf9534b3af582909513e067d7e354171f724887db33412c396d9ad531f8274f680b3805eadd5e825c7ab2c83bf78f96a7b4f221bee4f603fa6ec59190e44913201b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}