{"nftables": [{"metainfo": {"version": "1.1.1", "release_name": "Commodore Bullmoose #2", "json_schema_version": 1}}, {"table": {"family": "ip", "name": "x", "handle": 1}}, {"set": {"family": "ip", "name": "y", "table": "x", "type": "ipv4_addr", "handle": 1}}]}