Bash script - Command fails when run as variable, but works otherwise

Question

I have a simple script, but for some reason it fails when running the command as a variable. Any ideas as to why? (I am trying to change device setting of pipewire with a script)

cmd2="pactl set-card-profile 'bluez_card.B8_F8_BE_79_40_C0' 'headset-head-unit-msbc'"
$cmd2  
#Command above Fails with "Failure: No such entity"

pactl set-card-profile 'bluez_card.B8_F8_BE_79_40_C0' 'headset-head-unit-msbc'
#command above works fine. (if I modify the bluez to blue99 it fails as cmd2 did)

Answer 1

Don't know why this worked.. but removing the ' fixed it..

cmd2="pactl set-card-profile bluez_card.B8_F8_BE_79_40_C0 headset-head-unit-msbc"
$cmd2