{
    "filters":{
        "op":"and",
        "content": [
            {
                "op":"=",
                "content": {
                    "field":"subject.species.id",
                    "value":"NCBITAXON:9606"
                }
            },
            {
                "op":"=",
                "content": {
                    "field":"sample.pcr_target.pcr_target_locus",
                    "value":"IGH"
                }
            }
        ]
    }
}