Not sure how to pull extra info

I am creating a course catalog on a WordPress site using the Populi REST API
I have successfully pulled the information and styled my page (temporary styling)
But, the API documentation says that I can expand the information pulled and I need some of that extra information – specifically faculty and tuition schedules. I cannot figure it out.

The API Documentation reads: Some calls are expandable. That means, in the request, you can specify that you want additional information included in the response. For example calling /people/123 will give you back basic information about the person with ID 123. However, calling /people/123 with "expand": ["addresses", "phone_numbers", "tags"] in the JSON request body will cause that person’s addresses, phone numbers, and tags to be included in the response.

And, the expandable properties for the CatalogCourse route are as follows:

Expandable Properties

• faculty
• corequisites
• course_equivalencies
• prerequisites
• programs
• department
• tuition_schedules

But, I am unsure how to amend the JSON request body to include the two additional parameters.

The page I need help with: [log in to see the link]