How to access or set slots in custom actions written in other programming language?

I want to implement an architecture with following flow -

i want the action server to run on my node server as i want my API handling on node not on python

Now in docs i.e -

Here there is a response structure given .

so my main points are

How can i get this response using postman?

How can i set ,reset and access slots using other language ?

Any existing example if anybody have tried custom actions on any other language other than python