Thanks a stack! For the records, I am exercising it on behalf of my example artefact.
pip install pybase62
python
>>> import base62
>>> input = "gMd7ipqm8LhRdgpk1Qjg273QDO7"
>>> hex(base62.decode(input, base62.CHARSET_INVERTED))[2:].zfill(40)
'7595f1ad65c69e20c87dcb324f5d049080315aef'
Then, after adding the appropriate prefix, one can indeed derive the full URL.
https://community.hiveeyes.org/uploads/default/original/2X/7/7595f1ad65c69e20c87dcb324f5d049080315aef.wav