Document the 'Postman Collection' option a little more clearly

[ELLIOTTCABLE]

Hi! I'm not familiar with Postman and the like, so this may just be user idiocy … but it's unclear to me why this doesn't work:

I wished to add this official documentation to APIs.guru:

https://help.getharvest.com/api-v2/introduction/overview/postman-collection/

A little more details about what should be pasted into the "URL to the definition" field (especially when you click 'details' next to "Postman Collection"; a link to their webapp isn't very helpful) would help us add things to the directory more easily. (=