The default media type in a POST request is **application/x-www-form-urlencoded**. This is a format for encoding key-value pairs. The keys can be duplicate. Each key-value pair is separated by an & character, and each key is separated from its value by an = character.
For example:
***Name: John Smith
Grade: 19***
Is encoded as:
***Name=John+Smith&Grade=19***
This is placed in the request body after the HTTP headers.