+----------------------------+
| GET /api/v1/users          |
| --dry-run  a->b  x * y     |
| user_id  C:\temp  (opt)    |
| v2.0  o_O  [1]  e.g. it's  |
| http://host:8080/path      |
| Vote  over  video  x10     |
+-------------+--------------+
              |
              v
+----------------------------+
| Kafka topic                |
+----------------------------+
