neutron-lib/api-ref/source/v2/samples/taas/taf-create-request.json

{
    "tap_flow": {
        "name": "tf1",
        "source_port": "ee2911c3-08e7-44cb-81aa-fbee2cf43168",
        "tap_service_id": "1b059120-078b-4f25-bb16-e14d69706a9a",
        "direction": "BOTH"
    }
}