title: Difference between JSON content types
body: <p>I know there exists a question <a href="https://stackoverflow.com/q/477816/1416970">The <em>right</em> JSON content type?</a> but I am confused when should one use which content type.</p>
  <p>Hence the question : What are the differences between the various JSON content types and when should one prefer using which one ?</p>
  <p>According to answers on similar questions on stackoverflow , application/json is the correct JSON content type but I was thinking then why are the JSON content types still used , what is the reason for that?</p>