This phrase appears to combine terms that likely relate to a compressed archive file (7z) and metadata or identifiers (ams, cherish, set 285, no password). Below I interpret plausible meanings, security and legal implications, and practical examples for different contexts.
"Radio Creds" are votes awarded to artists by radio programmers who have downloaded their music and have been impressed with the artist's professionalism and the audience's response to the new music. Creds help artists advance through the AirPlay Direct community.
Only radio accounts may add a Radio Cred. One week after the track has been downloaded the radio account member will receive an email requesting a Cred for each artist they've downloaded. ams cherish set 285 no password 7z