Disconnecting specific participant in Genesys Cloud Conference

Trying to drop a single participant from an active conference call via the API. I’m hitting POST /api/v2/conversations/conferences/{id}/participants/{participantId}/disconnect with a valid OAuth token, but I keep getting a 404. The conference ID and participant ID are definitely correct since I grabbed them from the live event stream. Am I missing a specific header or is the endpoint structure different for multi-party calls?