ENCOUNTER START

Fires at the start of an instanced encounter.
 ENCOUNTER_START: encounterID, encounterName, difficultyID, groupSize
==Payload==
:;encounterID: - ID for the specific encounter started.
:;encounterName: - Name of the encounter started
:;difficultyID: - ID representing the difficulty of the encounter
:;groupSize: - Group size for the encounter. For example, 5 for a Dungeon encounter, 20 for a Mythic raid. The number of raiders participating is reflected in "flex" raids.
==Patch changes==