Event response

category event category (Tracks/Playlists/Community)
created_at iso datetime of event creation (YYYY-MM-DDThh:mm:ssTZD)
event_type   if category is Tracks : abuse_report, comment_track, message_track, private_group_track, delivery_track, track_invalid, track_published, subscription_track, track_by_sponsor
  if category is Playlists : comment_playlist, message_playlist, subscription_playlist, playlist_by_sponsor
  if category is Community : friendship_follower, friendship_mutual, user_from_invite, comment_user
  more details
id event id
read_at iso datetime of event read (YYYY-MM-DDThh:mm:ssTZD)
record_id record id (if available)
record_type record type (if available)
record_picture absolute url of record picture (if available)
record_name record name (if available)
user_id id of user spark off the event
user_name user name
user_picture absolute url of user picture