+-----------------+    dummy request     +------------+
|        |        |    with extended     |            |
|        |        |        token         |            |
|        +--------|=====================>|------.     |
|                 |                      |      |     |
|                 |                      |      |     |
|                 |                      |      |     |
|                 |                      |      |     |
|              ???|<---------------------|------'     |
|                 |     Reset message    |            |
|                 |   with only message  |            |
+-----------------+    ID echoed back    +------------+
      Client                                 Server