ENCOUNTER START

Fires at the start of an instanced encounter. ENCOUNTER_START: encounterID, encounterName, difficultyID, groupSize

Payload

 * encounterID : number - ID for the specific encounter started. (Does not match the encounterIDs used in the Encounter Journal)
 * encounterName : string - Name of the encounter started
 * difficultyID : number - ID representing the difficulty of the encounter
 * groupSize : number - 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.