How to convert json to pojo class

How i can convert get/post response json into pojo class

for example i have a json like this

"popup": {
    "menuitem": [
      {"value": "New", "onclick": "CreateNewDoc"},
      {"value": "Open", "onclick": "OpenDoc"},
      {"value": "Close", "onclick": "CloseDoc"}

and i have a pojo class Example.ts

declare module Example {

    export interface Menuitem {
        value: string;
        onclick: string;

    export interface Popup {
        menuitem: Menuitem[];

    export interface RootObject {
        popup: Popup;

what should i write in success funtion so the above response convert automatically into Example.ts

                      type: "GET",
      success : function(responseText)
    error: function(XMLHttpRequest, textStatus, errorThrown)
        alert("Status: " + textStatus);