Retrieve a small preview of an audience so you can validate it
before exporting. This is a capped, redacted teaser, not a data feed:
it returns up to 25 rows carrying firmographics, role, intent, first name,
and the HEM match key, plus has_* flags indicating which contact fields
exist. Raw contact data (emails, phones, LinkedIn, personal address, full
name) is NOT returned here; download/unload the audience to get (and be
billed for) the full contact records. total_count reports the audience's
true size regardless of the sample size.