As @alexander-t mentioned:

path="/user/manage/:id/:type"

If you want to keep them optional:

path="/user/manage(/:id)(/:type)"

React Router v4

React Router v4 is different than v1-v3, and optional path parameters aren’t explicitly defined in the documentation.

Instead, you are instructed to define a path parameter that path-to-regexp understands. This allows for much greater flexibility in defining your paths, such as repeating patterns, wildcards, etc. So to define a parameter as optional you add a trailing question-mark (?).

So, to define optional parameters, you can do:

path="/user/manage/:pathParam1?/:pathParam2?"

i.e.

<Route path="/user/manage/:pathParam1?/:pathParam2?" component={MyPage} />

Whereas, The mandatory Parameters are still same in V4:

path="/user/manage/:id/:type"

To access PathParam’s value, you can do :

this.props.match.params.pathParam1