{"nftables": [{"metainfo": {"version": "VERSION", "release_name": "RELEASE_NAME", "json_schema_version": 1}}, {"table": {"family": "inet", "name": "t", "handle": 1}}, {"set": {"family": "inet", "name": "s", "table": "t", "type": "ipv6_addr", "handle": 1, "flags": ["interval"], "elem": [{"prefix": {"addr": "fe00::", "len": 48}}]}}]}