Kodi Automation

I have an automation that watches for Kodi instances to become idle, then display an image that is hosted on my website (a screenshot of magic mirror).

I would like to detect when this image is being displayed, and refresh it every 60 seconds.
I want to pick up this field “media_title: mm.png”

How would i pick this field / attribute up as an automation condition?

From this I understand that you want to pick the attribute as automation trigger, no?

Automation Trigger - Home Assistant → “attribute”