+------------------------------------------------+
        |                                                |
        | Client                                Server   |
        |                                                |
        |     ---------  Q4S READY 2 -------------->     |
        |     <---- Q4S 200 OK with trigger URI-----     |
        |                                                |
        |     ---------   HTTP GET ---------------->     |
        |                                                |
        |            (Application starts)                |
        |                                                |
        +------------------------------------------------+