final String USER_AGENT = ""Mozilla/5.0 (Windows NT" +n" +
     "" 6.1; WOW64) AppleWebKit/535.2 (KHTML, like Gecko) Chrome/15.0.874.120 Safari/535.2"";
    String loginFormUrl = "https://page.com/login";
    String loginActionUrl = "https://page.com/json";
    String username = "email@gmail.com";
    String password = "XXXX";

 HashMap<String, String> cookies = new HashMap<>();
 HashMap<String, String> formData = new HashMap<>();


 Connection.Response loginForm = Jsoup.connect(loginFormUrl).method(Connection.Method.GET).userAgent(USER_AGENT).execute();
 Document loginDoc = loginForm.parse(); // this is the document that contains response

 cookies.putAll(loginForm.cookies()); // save the cookies, this will be passed on to next request

 formData.put("commit", "Sign in");
 formData.put("utf8", "e2 9c 93");
 formData.put("login", username);
 formData.put("password", password);
 formData.put("authenticity_token", authToken);

 Connection.Response homePage = Jsoup.connect(loginActionUrl)
         .cookies(cookies)
         .data(formData)
         .method(Connection.Method.POST)
         .userAgent(USER_AGENT)
         .execute();

System.out.println(homePage.parse().html());  //The json response use this to iterate and draw