Lambda return types through HTTP API Gateway - only json array or json object are working , else error 500

I'd like to return binary data through the HTTP API Gateway (HTTP , NOT REST API!), but the response has to be a json object, always. Is there some workaround to make that happen like it is possible for the REST API ?

```
#include
using namespace aws::lambda_runtime;
static invocation_response my_handler(invocation_request const& req)
{
return invocation_response::success("binarygoeshere", "application/zip");
}

int main()
{
run_handler(my_handler);
return 0;
}
```
^this returns error code 500