Support for setting variables based on response data

It would be nice to be able to set variables for a future request (or cd to a path) based on the previous response data. Something like JSONpath syntax would be simple yet effective:

Response body:

{
  "id": "17f96808-886a-452e-bbc7-956d27c6cd9d",
  ...
}

> fooId=$.id

> cd $.id