Cloud API Postman

Hi, I am trying to go through the Cloud API reference information and I am having some issues with the Postman steps.

I can run the List devices successfully, however to turn the LED on and off I can only do that by using the raw option not the x-www-form-urlencoded.

Are there some steps I am missing or not doing correctly?
Thank you for the help.

The default format should be raw, which will generate JSON. This is the recommended method.

If you really want to use x-www-form-urlencoded you can, but go into Headers and uncheck the Content-Type.

Thank you so much for the help!