# play
spotify-cli --play
# next / prev
spotify-cli --next
spotify-cli --previous
# meta
spotify-cli --meta --meta-format "{artist} - {title}"
# open
spotify-cli --open <URL>
you could also use it in your polybar like this
[module/spotify]
type = custom/script
label = "%{A1:spotify-cli --prev:} %{A}%{A1:spotify-cli --toggle:} %{A}%{A1:spotify-cli --next:} %{A} %output%"
exec = spotify-cli --meta
exec-if = pgrep -x spotify
interval = 5