'ea':'edx.bi.email.opened',# event action: in this case, the user opened the email
'tid':get_value("GOOGLE_ANALYTICS_TRACKING_ID",getattr(settings,"GOOGLE_ANALYTICS_TRACKING_ID",None)),# tracking ID to associate this link with our GA instance
'uid':context['thread_author_id'],
'cs':'sailthru',# Campaign source - what sent the email
'cm':'email',# Campaign medium - how the content is being delivered
'cn':'triggered_discussionnotification',# Campaign name - human-readable name for this particular class of message
'dp':'/email/ace/discussions/responsenotification/{0}/'.format(context['course_id']),# document path, used for drilling down into specific events
'dt':'Reply to {0} at {1}'.format(context['thread_title'],context['comment_created_at']),# document title, should match the title of the email