build web service from existing django project

[Emme Gi]

Hi, I'm discovering tastypie just now to implement a web service from an existing django project.
I have a structured data like this:

{'element1': {'data1': 2, 'data2': 'pippo', 'data3': 4}, 'element2': {'report1': 'pluto', 'report2': 4, 'data1': 3}}

that I want to serve with tasypie.
This data are from an existing class (NOT Model) in the project.
How can I retrieve the data and serve with tastypie?
I never built a REST web service, I always worked with SOAP.

Thanks in advance.
Marco