will it work with echo dot

Greetings
I am trying to get an echo dot to play music contained in a folder on my kindle. If I set up subsonic on the kindle and set up spotify will I be able to tell 'alexa' to play tracks from the folder on the kindle?
thanks for any help
Dave
I am trying to get an echo dot to play music contained in a folder on my kindle. If I set up subsonic on the kindle and set up spotify will I be able to tell 'alexa' to play tracks from the folder on the kindle?
thanks for any help
Dave