How to cut part of the url before the question mark and make a redirect?

Question

Nginx

Good afternoon. There is a url => example.com/compgraf/space/25623/3717/lesson.doc?width=1&height=y
You need to cut /compgraf/space/25623/3717/lesson.doc and paste at the end example.com/download.html ?file= to get the following request:
example.com/download.html?file=/compgraf/space/25623/3717/lesson.doc
Tell me how to make a redirect in the location section using ngnix. Thank you!