What it the format of acme.json in traefik v2?

I am looking to extract the .pem, .crt, and other data using a python script in a docker file so I can use the ssl cert with a mailserver. It looks like the format changed from v2 to v1. I am looking to run the python script to extract it everytime the file changes for another docker container running an mail server that needs the ssl cert.

David F