When I submit my PUT request I don't want to send an empty string, I want to omit the whole field from the request (or send null maybe?).
Is there a way to do that?
hmm, are you talking about omitting things from the request body? im assuming you’re using the JSON body form?
so, you can send null by doing {{ null }}.
as for omitting, that’s not supported on that form unfortunately 
you can instead switch to the “Raw” body, add an explicit Content-Type: application/json header, and then you can format the JSON however you please.