has 'mentioned' (array of mentioned profiles), 'url' (url to link as),
'title' (title of the link), 'position' (position of the text to
replace), 'text' (text to replace)
+
+StartShowSubscriptionsContent: before showing the subscriptions content
+- $action: the current action
+
+EndShowSubscriptionsContent: after showing the subscriptions content
+- $action: the current action