email: email ID of the user. This is a mandatory field for every user. This also acts as the UID (unique ID) of the user if it is not explicitly mentioned.
first_name: First name of the user.
last_name: Last name of the user.
last_seen: The timestamp when the user was last seen on your website or app.
last_contact: The timestamp when the user was last contacted via an email/message/sms or a push notification.
last_opened: The timestamp when the user last opened your message (email/message)
last_clicked: The timestamp when the user last opened your message and clicked on a link within (email/message)
signed_up_at: The timestamp when the user first signed up for your website/app. This can also be the time that the user data was added to BME.
While BME comes with a predefined list of user properties, you can also define custom properties depending on your need. Here’s how you do it:
Login to BME and access the settings page. Then click on User Properties > Add User Property