Fix

src/WebSocketPayload.ts

@@ -45,7 +45,7 @@ export class WebSocketPayload {
             return null;
         }
 
-        let wsEvent = <keyof typeof WebSocketEvent> rawPayload.event;
+        let wsEvent = WebSocketEvent[<keyof typeof WebSocketEvent> rawPayload.event];
 
         return new WebSocketPayload(wsEvent, rawPayload.status, rawPayload.data);
     }