octavia/api-ref/source/v2/examples/member-update-request.json

{
    "member": {
        "name": "web-server-1-2",
        "weight": "0",
        "admin_state_up": "true",
        "monitor_address": "192.0.2.40",
        "monitor_port": 8888,
        "backup": false
    }
}