Return json data instead of string?

[honkerst]

Is your feature request related to a problem? Please describe.
I'd like to use Upcoming Media Card as a compact text list using Markdown as per Mayker's post here:
https://community.home-assistant.io/t/lovelace-upcoming-media-card/66562/694

Describe the solution you'd like
Return the actual JSON instead of returning the JSON data as a string, as per Mayker here:
https://community.home-assistant.io/t/lovelace-upcoming-media-card/66562/707

Thanks.