{
  "manageEntity": {
    "action": "Save",
    "entityId": "1322731670",
    "entityType": "Track",
    "nonce": "0x50ba7b271b1bd5dd6dd013611a077c1f75c51523578254b24eae72689d844df0",
    "signature": "0x2b05550dc95e6550beefa87dc51e2a6116b334d46098b7cc4fb07b3cc1b667a5477a6624d0035efb626a1cf7ad87988064237b12ca2b537cea1a432c170059a01c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}