Create JSON files and send via emails

I wanted to reach out and see if people have developed forms that either

1. construct JSON text strings in the workflow and create a text/JSON file appended to an email action and whether or not it works
2. and if there are better ways / connectors to leverage such a request.

I have a form and workflow from another application that I need to rebuild into Nintex however this 1 item is a blocker for us. The other application has a native action to construct JSON from the contents of the form/workflow upon submission.

I am trying to avoid the following as well:

1. create and store file in external repository
2. call file from external repository