Node red creating scenes on the fly

Is is possible to see someones flow of how they achieved this please?

I think I’m messing something up and getting getting errors with the converted JSON when trying to create a scene based off multiple lights current state

[{"service":"scene.create","data":{"scene_id":"heating_before","snapshot_entities":["light.ceiling_light","light.strip","light.tv","light.nanoleaf","light.bed","light.kitchen_light"]}}]

Can anyone point out where Im going wrong please?