source: "string",
tracking: "string",
state: "string", // 2-letter state abbreviation (capital letters) e.g. "CA"
home_zip_code: "string", // 5-digit zip code
email_address: "string",
first_name: "string",
last_name: "string",
locale: "string" // 2-letter locale code (lower case) e.g. "es"
