Klaviyo properties include:
Email
Klaviyo ID
First Name
Last Name
Organization
Title
Phone Number
Address
Address 2
City
State / Region
Country
Zip Code
Latitude
Longitude
Source
Consent
SMS Consent Timestamp
First Active
Last Active
Profile Created On
Date Added
Last Open
Last Click
$consent_form_id
$consent_form_version
$consent_method
$timezone
$id