The rootData object holds some core person fields for use in Fresh Relevance, the fields are:

Field	Type	Description
fn	string	First name
ln	string	Last name
e	string	Plain email address
b64e	string	Base64-encoded email address
rc4e	string	RC4-encrypted email address
cid	string	Customer ID, usually a username or user ID used on your website
curr	string	Currency - ISO 4217 currency code e.g. USD
eid	string	External ID, usually to identify users in another platform
lang	string	Site language e.g. en-GB
mobile	string	Mobile/Cell/SMS number in E.164 format
perm	boolean	Permission to send emails to the person
sbr	string	Site brand