cat /etc/thruk/thruk_local.conf

<action_menu_items>
    hostmenu = {\
       "icon": "/thruk/themes/{{theme}}/images/dropdown.png",\
       "title": "Host Menu",\
       "menu": [\
           {\
               "icon": "/thruk/themes/{{theme}}/images/delete.png",\
               "label": "Delete Host",\
               "action": "server://echo/$HOSTNAME$"\
           },\
       ]\
    }
</action_menu_items>

<action_menu_actions>
    echo     = /opt/script/echo.sh "test"
</action_menu_actions>

<action_menu_apply>
    hostmenu    = .*;$             # matches all hosts only
 </action_menu_apply>

ll /opt/script/
total 20
drwxr-xr-x 2 www-data www-data 4096 May 27 10:28 ./
drwxrwxrwx 3 root     root     4096 May 27 09:01 ../
-rwxr-xr-x 1 www-data www-data   59 May 27 10:22 echo.sh*

cat /opt/script/echo.sh
#/bin/bash

echo $@
echo $@ >> /opt/script/echo.log
exit 0