Is it possible to receive customized OPC UA A&C EventTypes over node-red-contrib-opcua?

Hey,
I would like to create a OPC UA Client in Node-Red, which receive the Alarms from my Siemens PLC S7-1500. The alarm handling in the PLC is programmed with the program-alarm function. So the OPC UA Server sends the message with all additional information. The message is part of the BaseEventType, but for the additonal information Siemens created an new EventType "SimaticEventType", which is also based on the BaseEventType.
Actually I am able to read the basic informations, but I am not able to read the additonal information. What do I have to do in Node-Red to receive also the additional informations?

Thanks for your help!