Date and time the contact was created.
Contact ID.
Contact's details.
Details about the contact's last action in the site.
Contact's primary email details.
Contact's primary phone and email.
Contact's primary phone details.
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 last updated.