# meta nfproto ipv4 ct original saddr 1.2.3.4
[
    {
        "match": {
            "left": {
                "ct": {
                    "dir": "original",
                    "key": "saddr"
                }
            },
	    "op": "==",
            "right": "1.2.3.4"
        }
    }
]