You’re welcome! Glad to hear it is helpful info.
There are a couple of places in the docs where the user ID format is documented (example), but I’m not sure if there is documentation for URL-encoding the user ID when calling the Management API.
Regarding the array of objects, I found the schema by calling the GET/api/v2/users/{id}/permissions endpoint to see what the array of objects should look like. I agree that it could be helpful to include the schema of the objects in the docs directly. I will pass on that feedback. Thank you!