neutron-lib/api-ref/source/v2/samples/bgpvpn/router_associations/router_association-update-response.json

{
    "router_association": {
        "id": "c63149a0-a0b3-4ca7-aba4-9aaa1b39d7f3",
        "project_id": "b7549121395844bea941bb92feb3fad9",
        "router_id": "46a1a80b-7c42-4c45-88fd-b531e636969f",
        "advertise_extra_routes": false
    }
}