In order to facilitate Collaborate API testing, we have released a Postman collection that is very much click and play. The README.md explains how to use the collection. For more information on or to download Postman, visit the Postman website. Don't forget that you will need to have developer credentials in order to use this. Reach out to firstname.lastname@example.org to get yours today!
P.S. A special thanks to Kyle Kreamer in Blackboard Consulting for putting this together and sharing it with the community!