SOURCE

let data1=JSON.stringify({
    reqUrl: 'http://119.84.8.43:13205/order/list/v1',
    params:{
      "username": "user01",
      "userId": "1",
      "userType": "",
      "token": "token_value",
      "pageIndex": 1,
      "pageSize": 10
    },
    proxyHeaders: {
      'Content-Type': 'application/json' 
    },
    xmlToJSON: false,
    useCache: false
  });

$.ajax({
  url: 'https://qskanv-4500-rvwlmn.box.myide.io/',
  dataType: 'json',
  method: 'POST',
  data: {a:data1}
}).then(function(res) {
  console.log(res)
});