Be notified when records of a particular type are added to the store

I’m using moment-timezone and I’ve stored all the timezone data on the server-side. The idea being that timezone data would be downloaded on a when needed basis along with the model that uses the timezone. I need a way to convert these timezone models into a format that moment-timezone can use e.g. moment.tz.add({zones:{...}, rules:{...}, links:{...}). Is there any way to be notified when TimeZone records are added to the store so I can add that data to moment-timezone?