I mostly thought of using jsonb because the notification system is supposed to receive events from all sorts of different parts of the application that results in different structs, so I thought of storing them schemalessly (is that word?) as to just have them ready when the user access it… but reading the references you pointed me to, I started thinking of ways of having a Notification struct and have the different results to comfort to it somehow instead of the other way around.
Anyways, thank you so much for your time and for the references! 
