How to upload a file and JSON data in Postman?

In postman, set method type to POST.

Then select Body -> form-data -> Enter your parameter name (file according to your code)

and on right side next to value column, there will be dropdown "text, file", select File. choose your image file and post it.

For rest of "text" based parameters, you can post it like normally you do with postman. Just enter parameter name and select "text" from that right side dropdown menu and enter any value for it, hit send button. Your controller method should get called.

The Missing Visual Guide

You must first find the nearly-invisible pale-grey-on-white dropdown for File which is the magic key that unlocks the Choose Files button.

After you choose POST, then choose Body->form-data, then find the File dropdown, and then choose 'File', only then will the 'Choose Files' button magically appear:

Maybe you could do it this way: