Help streaming music

my mission is to say ‘alexa play playlist’

and a spotify playlist plays through my samsung soundbar

i have:

ST hub
harmony hub
echo (on its way)

i dont want o just play through echo as its a bit of a waste of my soundbar

come on people… we can figure this out!

Alexa doesn’t transmit. I wanted this option for the one at my camper. What I did was open it up and connected audio wires to the ones inside to add “audio out”. Put it back together and attached a bluetooth transmitter to it. Works great but its only 2ch audio

What it I got Alexa to send an IFTTT to pushbullet, then the pushbullet automates tasked on a separate tablet?