Sending Post Request with Headers or JSON Body

Is there any possible way that i can send post request with headers or even json body on version 5.25?
i’ve tried the very limited Fetch on that version but it seemed that it can’t do what i’m trying to.
is there any other possible way on that version?

here’s the supported parameters with Fetch on v5.25 :

Thanks.

the fetch tool has improved quite a lot since 5.25
Just looked at it on my 6.46.7 version and now there’s header-field and http-method parametrs (like get, put, post, delete). Have look at the manual entry
Probably it’s just a routerOS upgrade you need.

-Chris