{
  "manageEntity": {
    "action": "Save",
    "entityId": "170326275",
    "entityType": "Track",
    "nonce": "0xed89a436626d870102aaf0a46cdafd67bcc6b1ba5a77f8ba2a3dfb0609a5e9f4",
    "signature": "0x6193528777a875a5815a9e5d3f7e8acd57c4441fd34f3494ed8e002890bca8997dfa0e49371128684e781a259802a39ffba8280524ea91ad1ffa79e76e33f70f1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}