Creating UStructs in Python

[EPG]

I defined a UStruct in C++, consisting an FString and two integers. I want to create one of these so I wrote these lines:

            trackinfo = ue.get_type_from_struct(ue.TrackInfo)
            trackinfo.set_editor_property("label", track_name)
            trackinfo.set_editor_property("from", start)
            trackinfo.set_editor_property("to", end) 

But I keep getting these errors:

LogPython: Error: Traceback (most recent call last):
LogPython: Error: File “<string>”, line 1, in <module>
LogPython: Error: File “C:/Program Files/Epic Games/UE_4.23/Engine/Plugins/MovieScene/SequencerScripting/Content/Python\zenify.py”, line 110, in <module>
LogPython: Error: run()
LogPython: Error: File “C:/Program Files/Epic Games/UE_4.23/Engine/Plugins/MovieScene/SequencerScripting/Content/Python\zenify.py”, line 31, in run
LogPython: Error: trackinfo.set_editor_property(“label”, track_name)
LogPython: Error: TypeError: descriptor ‘set_editor_property’ requires a ‘StructBase’ object but received a ‘str’