{
  "manageEntity": {
    "action": "Save",
    "entityId": "471113",
    "entityType": "Track",
    "nonce": "0xb4bec47703f5c8d35a45939ae7ff0786bf1525ec6af060fd75198cc3cb3d4a4d",
    "signature": "0xb2fdf4f6b04880b39af2eab0503b74d59dc64b7514f605a57e7f4300b4ceb63f580d9a21f3bb9c051387ec7fc0f311a8352b77b4a35d40beb117c50466fa19021c",
    "signer": "0xd1bC12b8b46f2FAa152aB791052b4a26826F86F5",
    "userId": "481080235"
  }
}