Previous
Jumps to the previous track index on the specified/assumed/elicited player.
Invocation options (choose based on grammar-fit):
Alexa, [ open / start / launch ] MediaServer
Alexa, [ ask / tell ] MediaServer [ to / for ] …
{song} can be any of [the] song/tune/track/number/something.
previous tune
previous track
previous on {Player}
previous in {Player}
previous on the {Player}
previous in the {Player}
previous on {Player} player
previous {song} on {Player}
previous {song} in {Player}
previous on the {Player} player
previous {song} on the {Player}
previous {song} in the {Player}
previous {song} on {Player} player
previous {song} on the {Player} player