Wake up NAS by Moode

[shitonthename]

So, any ideas how to trigger a .sh script in which I say 'wakeonlan <mac_address>'? As the Pi for moOde is always on, the script shall not simply run during startup - it shall run always when moOde wants to access media which is stored on the NAS (in other words: when I want to playback something from the NAS). That would wake up my openmediavault based NAS which could then be created on old hardware - because it would sleep most of the time and doesn't waste energy.