Spring Integration DSL access error body in error handling flow

Question

I’m not able to access the error body in my spring integration error handling flow

Message received from external system Status: 400 Bad Request

Response body: { “title”: “record already exists”, “errorCode”: -1 }

Tried to access the response body but unable to do so msg.getPayload().getCause(), (MesaagingException)msg.getPayload().getRootCause() doesn’t work either. Only able to retrieve the status.