{
  "manageEntity": {
    "action": "Save",
    "entityId": "340070",
    "entityType": "Track",
    "nonce": "0xdc1ec63f2df1bc49dd85782674ef7a316a7ab9d216d4840123eaedb7591a4091",
    "signature": "0x141326aa08dbb6cc20fb94f1e4300c1df31e8d7a567c6527633c6716638ba553150ab23620b6b5e5e5565732c7b521563a10a695ad7ebf9c51339287c8d6b9601b",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}