批量获取多个客户端的订阅列表

{
    "code": 1,
    "message": "批量获取订阅列表成功",
    "language": "zh-CN",
    "timestamp": 1697548800000,
    "data": {
        "clientIds": [
            "client_123456",
            "client_789012"
        ],
        "subscriptions": {
            "client_123456": [
                {
                    "topic": "chat/room123",
                    "qos": 1
                }
            ],
            "client_789012": [
                {
                    "topic": "notification/user789",
                    "qos": 0
                }
            ]
        }
    }
}