Send an image when firing an event via REST API

Configuration
1

I created an automation that uses a custom event that I can fire through the REST API. It triggers a service creating a notification on my phone. Works very good.

Now I would like to append an image to the REST call and include that in the message that pops up on my phone. Is that doable?

2

Solved it by firing an event towards HA from thr Pi Nano and having HA request the image vice versa and attach it to the push message. Works like a charm. I love HA.