{"public_id": "b4934696-33bd-4fbe-8af5-472bfbf08f8f", "provider": "public_directory", "external_id": "county-fill:office:IA-19153-county-supervisor", "source_url": "https://member-portal.iowacounties.org/countydirectory/directory/Polk", "source_name": "Iowa State Association of Counties: ISAC County Directory: Polk County", "fetched_at": "2026-10-05T20:05:43+00:00"}