{
  "manageEntity": {
    "action": "Save",
    "entityId": "1348504002",
    "entityType": "Track",
    "nonce": "0x35a3c8c47f483ebe53d24b01ca4954ee62f39883481f6b41098eccf627fb135d",
    "signature": "0xbd142841071637cec6e7d32e21acdeee10328b161600485a4aac4f787b1d9262503761934922bfaab7dbb8dbda0d4fbda45e28a6743d23d3e6fad76563ce34051b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}