fully setting event fields and dealing with multi-line data

I use the following router call to create events using the API:

data = dict(device=device_name, summary=summary, severity=severity,
component=component, evclasskey=evclasskey, evclass=evclass)
return self.__router_request('EventsRouter', 'add_event', [data])

I have been frustrated in the past by not having field names to directly post to fields in events -- there's a comment in the developer guide that "For other parameters please see class Event." -- I don't know where to find that. Not sure that this is going to give me additional data field names. 

Basically I want a methodical way to determine for a given event field, including potentially ones that are "sub-fields" that I can create an event using the API with all the values that I want to provide. 

In the interim I "overloaded" the summary field with the data that I wanted to set and then used this transform to break it out to the fields I wanted (summary in the API isn't actually summary, its message, with the first set of characters set to summary):

import re
evt.summary=re.search('(?<=SUMMARY:)(.*)(MESSAGE:)',evt.message).group(1)
evt.fault_type=re.search('(?<=FAULT_TYPE:)(.*)(ENDMESSAGE)',evt.message).group(1)
evt.message=re.search('(?<=MESSAGE:)(.*)(?<=FAULT_TYPE:)',evt.message,re.DOTALL).group(0)[:-11]


Not being a sophisticated regex user, it took me an hour to figure out the syntax on that last one to allow multi-line input messages to be found (I still probably could improve on it). 

Thanks in advance for any guidance!

{
	"action": "EventsRouter",
	"method": "add_event",
	"data": [{
			"summary": "this is a test",
			"device": "testAdd1",
			"component": "test",
			"severity": 4,
			"evclasskey": "sma",
			"evclass": "/Perf/CPU",
			"coolNewField": "cowBell",
			"Ren": "Stimpy"
		}
	],
	"tid": 1
}