title: How to pass variable in request body?
body: <p>I want to pass one variable in request body.But whole body needs to go as a string.</p>
  
  <p>for example : </p>
  
  <pre><code>var xyz = "abc";
  var requestBody = '{"name":"xyz"}';
  </code></pre>
  
  <p>How can I pass the variable value in request body.Whole request body needs to go as a string.Complete string has one variable.</p>