Updating fields on a skuid model with the response after running javascript snippet

I have 4 fields in model like VIN, make, model, year. when i enter VIN number,Once user is making entry in VIN field i am making callouts and getting response from external web-service through java-script , i am able to parse the response back and store it in java script variables… now i need an approach to store back the response in the remaining fields on that model… Pls help with a workaround to achieve this.