+-----------------+     request with     +------------+
|        |        |   serialized state   |            |
|        |        |       as token       |            |
|        +--------|=====================>|------.     |
|                 |                      |      |     |
|    look ma,     |                      |      |     |
|    no state!    |                      |      |     |
|                 |                      |      |     |
|        +--------|<=====================|------'     |
|        |        |     response with    |            |
|        v        |   token echoed back  |            |
+-----------------+                      +------------+
      Client                                 Server