Trigger the blueprintPageCreateEvent for pages created from the Space blueprint

I would like to use a listener to modify pages created by a Space blueprint. These pages are set as content-templates in the space-blueprint. Unfortunately, the blueprintPageCreateEvent is not being triggered. The pageCreateEvent is the one being triggered and it doesn't provide enough information for me to know that is one of the pages created from the Space blueprint.

Please provide a way to check that a page was created from a template specified in the space blueprint.