{
  "manageEntity": {
    "action": "Save",
    "entityId": "1991831203",
    "entityType": "Track",
    "nonce": "0xdce7ca818ba03fa4ed370eb70889cb77a58c59ae52dc7334c381f325461c00cb",
    "signature": "0x0164d22fca338d97397388c18b54f99ae3a203d86dfaf065cc0feb5d8da890050eaa8cf79d2f1db28512ce9464a6945431c27407e5e3989b91cac4ead92209301c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}