Contact ID.
Revision number, which increments by 1 each time the contact is updated.
To prevent conflicting changes,
the existing revision must be specified when updating a contact.
Details about the contact's source.
Date and time the contact was created.
Date and time the contact was last updated.
Details about the contact's last action in the site.
Contact's primary phone and email.
Contact's details.
Contact's primary email details.
Contact's primary phone details.