Return an instance of any type from the DMN decision table

Flowable Engine
1

Hi guys,
Is it possible to return an instance of any custom type (not just string, number, boolean or date) as a result of decision table evaluation?
For example, I have an expression that invokes my spring service in the output entry

<outputEntry id="LiteralExpression_1pe1wqy">
   <text>${my_SomeService.getSomeObject()}</text>
</outputEntry>

The service method may return, say, a POJO or JPA entity that I want to save in a process variable for later usage. I’m looking at ExecutionVariableFactory and guessing that it’s not possible, but maybe I’m missing something and there is a way to get what I want?