{
  "manageEntity": {
    "action": "Save",
    "entityId": "1343987098",
    "entityType": "Track",
    "nonce": "0x9077fc03379ae34008cce6aadfb7208dc4d1af79e82a876ed706e41a329e9322",
    "signature": "0xeace36586b71104daec573bb3399517e3238816f729c1d1f74f4a98de4577e937baa2b09cb0de131a7f9adf8ec1fefcee6bb4e13caa7ca5636898236ecec3d201c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}