Is there a json example of the "Activity Stream" Dashboard Gadget to add filters - Jira Cloud API

[Emin Okic]

Hope you are doing well today. 

I am looking to codify the creation of a dashboard and the design includes multiple activity stream gadgets. I was able to identify the cURL example to add the gadget to my dashboard, but was unable to find documentation of what the gadget's configuration looks like. 

Is there anywhere I can find information on what the "Activity Stream" gadget's json body looks like? Your time is important, and have taken the time to attempt this search prior to posting this question.