{
                "name": "routing",
                "version": "builtin",
                "enabled": true,
                "configuration": {
                    "rules": [
                        {
                            "url": "https://echo-api.3scale.net:443",
                            "owner_id": 2,
                            "owner_type": "BackendApi",
                            "condition": {
                                "operations": [
                                    {
                                        "match": "path",
                                        "op": "matches",
                                        "value": "^(/foo/.*|/foo/?)"
                                    }
                                ]
                            },
                            "replace_path": "{{uri | remove_first: '/foo'}}"
                        }
                    ]
                }
            },

curl "https://api-3scale-apicast-staging.apps.example.com:443/foo/+1234?user_key=b54627820843566c0ebdb86d2d7a20b7"  -k  
{
  "method": "GET",
  "path": "/%201234",
  "args": "user_key=b54627820843566c0ebdb86d2d7a20b7",
  "body": "",
  "headers": {
    "HTTP_VERSION": "HTTP/1.1",
    "HTTP_HOST": "echo-api.3scale.net",
    "HTTP_ACCEPT": "*/*",
    "HTTP_USER_AGENT": "curl/7.69.1",
    "HTTP_X_3SCALE_PROXY_SECRET_TOKEN": "Shared_secret_sent_from_proxy_to_API_backend_48c93e70ada1b37a",
    "HTTP_X_REAL_IP": "10.129.2.1",
    "HTTP_X_FORWARDED_FOR": "192.168.1.5, 203.0.113.192, 10.0.101.226",
    "HTTP_X_FORWARDED_HOST": "echo-api.3scale.net",
    "HTTP_X_FORWARDED_PORT": "443",
    "HTTP_X_FORWARDED_PROTO": "https",
    "HTTP_FORWARDED": "for=10.0.101.226;host=echo-api.3scale.net;proto=https"
  },
  "uuid": "1efc9803-adb6-4ccd-8999-4f1a954862bf"
}