Webcore, get json in string for raw data

Hi,
I would like to pass raw data through a web request and to be able to use the data within another post request (zapier) I must use a precise way like this:

{"name":"test",
"static_segment":["test@gmail.com","test@hotmail.com"]}

But when I try to built that way it never includes curly brace and when I try to use " to include quotes it keeps the backslash when using json() formula...

Any ideas? If I could make my post request working directly in webcore I wont use (zapier) but its the same thing, I have trouble passing the json data.
Thanks

did you see this: (as an example)

wow, thaks, I did not find this before! The only question that remains is that I m not able to add the first bracket I mean that if I use

"\["

its supposed to just add the bracket but it add nothing... but all other stuff is working... strange!