{
  "manageEntity": {
    "action": "Save",
    "entityId": "1313641862",
    "entityType": "Track",
    "nonce": "0x7210364693c74cb7579eac70bfbaed528060182e073dee0a307a21e22a10f275",
    "signature": "0xb4fde9619205e75b64c035de6c05fba4018d573b4e49863fd56ee54c1625424c27d9587cf6bad89b43ff89ad4f390cb1ec146cfa1d5dc900e13f37b8809f62201b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}