Savings songs to playlist on Google Home

[JPomerance]

Hi all, 

I am a spotify premium user trying to save songs I am listening to using my Google Home to my personal playlists. I try using the command 'Save this song to my playlist called ...' or 'Add this music to ...' or some variation. I get an error message along the lines of 'I can't help with that yet...' or something similar. 

Has anyone had a similar experience or know's whether this should be possible? 

I have spoken to Google who seem to think this feature should be accessible. 

Any help would be greatly appreciated! 

Thanks