How to Map Standard operator properties in v2 DX api for eg: pxCreateOperator is being passed by user from frontend (or i determine it from the token in auth either way) and i want to map the remaining properties for eg: pxCreateOpName on the case. How to do this? Is there an extension point in api/application/v2/cases or should i use the pyDefault of case type to map these properties. 

To add some context, we are using DX apis to create cases in traditional UI kit. Not constellation.