How can i create a event in Zoho CRM using deluge function with "Related To" field?

i tried the following code but it is not including Contacts as Related To.

eventMap = map();

eventMap.put("Subject", "Test");

eventMap.put("SMOWNERID", 1066798000016996135);

eventMap.put("Start DateTime", start);

eventMap.put("End DateTime", end);

eventMap.put("SEID", 1066798000016985001);

eventMap.put("SEMODULE", "Contacts");

createEvent = zoho.crm._create("Events", eventMap);