Field name	Description
#	EntityEventKey	A unique identifier for this record from the immediate source. This is the string key and the local key of the system. When records are received from other systems, a local key is commonly applied.
#	EntityEventSequence	A unique, system-wide ID that can be used to represent the sequence in which an EntityEvent occurred in a given system. This field serves as a logical timestamp, meaning that its values may be used to provide a total ordering of all events that occurred in the EntityEvent Resource. As event records are immutable, this value can grow fairly large over time; therefore, it’s represented by the Int64 data type. This sequence number is not expected to be unique across different organizations. This number must be a positive integer.
#	ModificationTimestamp	The timestamp when the field metadata item was last modified. This is used to help rebuild caches when metadata items change so consumers don’t have to re-pull and reprocess the entire set of metadata when only a small number of changes have been made.
#	OriginalEntryTimestamp
#	RequestItemId
#	ResourceName	A unique name given to available resources in order to distinguish them within the producer’s system. In general, this would be something like “Property,” “Member,” or “Media” but could also be used to represent custom resources. See also ResourceName
#	ResourceRecordKey	The primary key of the related record or resource, such as ListingKey, OfficeKey or MemberKey, that allows the record to be uniquely identified as an entity so that it may be fetched from the producer’s system.
#	ResourceRecordUrl	A Uniform Resource Locator (URL) that specifies where consumers may retrieve data corresponding to the given event. As the amount of data available from the EntityEvent Resource is expected to grow rapidly, producers may choose to compute this value rather than storing it.