Quite some work done here.

src/Game/Service/GameResponseService.php

@@ -0,0 +1,20 @@
+<?php
+
+namespace App\Game\Service;
+
+class GameResponseService
+{
+    public function getGameResponse(string $raw)
+    {
+        $info = json_decode($raw, true);
+
+        $message = $info['message'] ?? '';
+        $ts = $info['ts'] ?? '';
+
+
+
+        $data = [];
+
+        return $data;
+    }
+}