rank (its tier), row_count, size_bytes, sha256, created_at, and allowed, which says whether this workspace may download it:
Every morning a new file is published. Each one is a full snapshot of everything so far, so you only ever need the latest.
url valid for one hour, or 403 if the file is not unlocked for this workspace.
The file only holds public LinkedIn profile fields. It never contains who fetched what, emails of Datacircle users, costs or any credential.