{
  "manageEntity": {
    "action": "Save",
    "entityId": "1659259346",
    "entityType": "Track",
    "nonce": "0x31ac03d1d296a3b17bce0cace00e3011d1bf45a7722561952b380b67553edd50",
    "signature": "0x3494ab56c05c183531b5339c03889f4e28af7464d5a0499b405b960a4ed7863d5df979a80525242b3ae60435ffc161eb99771d1506b7af9012a34785413d31321c",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}