JSON Actions - GistLabs/mechanize GitHub Wiki
JSON Actions are like HTML Forms
This section is mostly TBD...!
A JSON Action is an extension of a JSON Link, with the inclusion of specifications for HTTP Method, HTTP Parameters, and body type.
Some examples from the web include https://gist.github.com/mikekelly/5619934 and https://gist.github.com/CharlotteGore/7302318