neutron-lib/api-ref/source/v2/samples/conntrack_helpers/conntrack-helper-update-response.json

{
    "conntrack_helper": {
        "protocol": "udp",
        "id": "2fc1eebb-e0fa-4c40-868a-7ace444717e1",
        "helper": "tftp",
        "port": 69
    }
}