{
  "manageEntity": {
    "action": "Save",
    "entityId": "1538839154",
    "entityType": "Track",
    "nonce": "0x6b782168cf9e17c284d9304068ec8e1ad205e2565e9a932ffa8cfd0aa580d8e4",
    "signature": "0x296bb18c7f54f5a78801567a419f583ff1f012e3bfea13effe521e4c63d11efe635c5210874cefec992261c5528cc5e7c4daec6110526c9b8b1cef549ba9f1941c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}