An individual merge var and value for a member.

The key of this object’s properties is the ID of the interest in question. The date and time the subscriber signed up for the list in ISO 8601 format. The IP address the subscriber used to confirm their opt-in status. The key of this object’s properties is the ID of the interest in question. The date and time the subscriber signed up for the list in ISO 8601 format. The IP address the subscriber used to confirm their opt-in status. The key of this object’s properties is the ID of the interest in question. The date and time the subscriber signed up for the list in ISO 8601 format. The IP address the subscriber used to confirm their opt-in status. The key of this object’s properties is the ID of the interest in question. The date and time the subscriber signed up for the list in ISO 8601 format. The IP address the subscriber used to confirm their opt-in status.