JSON Schema

I have created Mock servers with SoapUI based on a Soap WSDL... is it possible to create a Mock ReST service based on a JSON schema ?

I have reviewed the available options on the Community Edition ( 5.4.0 ) SoapUI but just dont see how to accomplish that. If this is not possible, is anyone aware of an alternative means of creatting a Mock Server based on a JSON schema ( short of writing one myself ).

Thanks