@startuml name
hide footbox
actor "ユーザー" as user
participant "Browser" as client
participant "サーバー" as server
participant "Web API" as api
participant "DB" as db
title:title

user->client:処理
activate client
    client->server:処理
    activate server
        server->api:処理
        activate api
            api->db:処理
            activate db
            return response
        return response
    return response
deactivate client
@enduml