title: Sending different format json to Okhttp
body: <p>for normal <code>json</code> like </p>
  
  <pre><code>{
      "text1":"going",
      "text2":"sending"
  }
  </code></pre>
  
  <p>i'm using <code>okhttp3</code> as</p>
  
  <pre><code>RequestBody body = new MultipartBody.Builder()
                    .setType(MultipartBody.FORM)
                    .addFormDataPart("text1",xxx)
                    .addFormDataPart("text2","yyy")
                    .build();
  </code></pre>
  
  <p>how do i use it to send for jsons like</p>
  
  <pre><code>{"Text1":"aaa","text2":[{"module":"bbb","Text":"xxx","params":{"lang": "eng"}}]}
  </code></pre>