Hi,
Whatever the object you are trying to return in the data source microflow, same object/entity should be mapped on Entity (path) in your template. PFA for better understanding :
Just map the object, not the association, as you are using the microflow to return the object on your document template.
Hope this helps
You should use a datasource microflow for your dataview. In this microflow you pass one parameter of type Person and retrieve the correct Signature based on your requirements. Use this object as return parameter to the dataview at the end of the microflow.