Izzy,

Are you meaning to send this to the mid server? Most people send directly to the cloud instance itself but obviously you can send it to the MID server using the new interfaces they deployed in the last few versions. Did you following the instructions in this section (I believe this is where you would do it):

https://docs.servicenow.com/bundle/kingston-it-operations-management/page/product/event-management/task/configure-midwebserver-extension.html#configure-midwebserver-extension