JSON Unmarshalling with multiple namespaces fails

I have JAXB classes from 2 XSD files that gets mapped to two different namespaces. First are the canonical types and second are my application types. I can marshal a JAXB class to JSON using mapped definition but when the same JSON is posted back and the unmarshaller tries to unmarshal it cant unmarshal and gives namespace errors. It is expecting a type from canonical name space and cant unmarshal.