"typed_config": {
                        "@type": "type.googleapis.com/udpa.type.v1.TypedStruct",
                        "type_url": "type.googleapis.com/envoy.tcp.metadataexchange.config.MetadataExchange",
                        "value": {
                          "protocol": "istio-peer-exchange",
                          "enable_discovery": true
                        }
                      }