THPDFJSONValue.SetStrMember

Writes an object member as a UTF-8 byte string, replacing any existing member with an identical key

procedure SetStrMember(const Key, Value: AnsiString);

The unit is HPDFDocJobs; the value is stored as UTF-8 bytes with no conversion

Reach for SetTextMember when the source is a UnicodeString

GetStr reads the member back