Returning simple types broken

[mkljakubowski]

Somehow returning simple types with actions makes them disappear and they return 404:

{
  "mocks": [
    {
      "on": {
        "endpoint": {
          "method": "post",
          "pattern": "/potato",
          "path": "/potato"
        }
      },
      "action": 12345
    }
  ]
}

This is useful if you want to have a post url from which you return an ID of created object.