Well, the templates are stored as plain blueprints, so you should be able to import/export them as regular strings without any issues - and it is fully vanilla-friendly in that regard. I wanted to make sure the blueprints as vanilla-friendly as possible (so you could at least used them as reminder in vanilla games on what your layout looked like).
So, can't recall off the top of my head of Factorio's blueprint strings are BASE64-encoded JSON, but if that's what they are, you should have no problem with these as well. Keep in mind - it's simply constant combinators in those personal logistics templates, nothing else. :)
