Here is a Jazz Blues Backing Track in A. I have played a few choruses of a walking bass line, and then left the backing track running without bass.
You can download a PDF of my walking lines and the chord sequence, by clicking the link in the video description on YouTube.
Jazz Blues are more often found in F or Bb, but I choose A for this track so you can compare the chord changes with my 12-Bar Blues Backing Track, which is also on my channel.
You might want to look at my ‘Starting Jazz’ playlist on YouTube, and also subscribe to get all my latest videos.
Learn how to use the Nashville Number System. It’s a great way to write and communicate chord sequences, making transposing easier too.
I explain all about this system and how to understand the way major and relative minor keys are related.
Full video over at Greg’s Bass Shed on YouTube, or on my website.