The question about subj.

When request created with field "interestedparty" the EDIT_REQUEST operation is OK:

http://localhost:8080/sdpapi/request/687?OPERATION_NAME=EDIT_REQUEST&INPUT_DATA={"operation":{"details":{"INTERESTEDPARTY":"mail1@mail, mail2@mail"}}}&format=json

BUT when the field "INTERESTEDPARTY" is missing in request (absent when request created), this operation will return "operation-result-status-Success", but nothing changes! The field is absent. oO

I need to add this absent field in a certain case. How to do it?  Please help :(