Action to populate a custom templates in PAD / Power Automate Desktop

[Fjalar]

It would be super useful to have an Action that enables you to populate a custom .txt templates, for e.g. JSON requests. 

This is very useful and saves a lot of manipulation when constructing dynamic request bodies for web services. something like this:

{
   "ObjectType":"Document",
   "ObjectClass": "{{1}}",
   "Properties": [
       {"NameOrTitle": "{{2}}"},
       {"person": "{{3}}"},
       {"phoneNumber": "{{4}}"},
       {"email": "{{5}}"},
}