This represents when a player is chosen to play an antag role.
{
"type": "antag",
"round_id": "integer",
"player_id": "integer",
"created_at": "string",
"data": {
"mob_name": "string",
"mob_job": "string",
"traitor_type": "string",
"special": "string",
"late_joiner": "string",
"success": "boolean"
}
}