remove redundant encode

src/NATSBridge.jl

@@ -300,19 +300,7 @@ function envelope_to_json(env::msg_envelope_v1)
       "encoding" => payload.encoding,
       "size" => payload.size,
     )
-    # Include data based on transport type
-      if payload.transport == "direct" && payload.data !== nothing
-        if payload.encoding == "base64" || payload.encoding == "json" || payload.encoding == "arrow-ipc"
     payload_obj["data"] = payload.data
-        else
-          # For other encodings, use base64
-          payload_bytes = _get_payload_bytes(payload.data)
-          payload_obj["data"] = Base64.base64encode(payload_bytes)
-        end
-      elseif payload.transport == "link" && payload.data !== nothing
-        # For link transport, data is a URL string - include directly
-        payload_obj["data"] = payload.data
-      end
     if !isempty(payload.metadata)
       payload_obj["metadata"] = Dict(String(k) => v for (k, v) in payload.metadata)
     end