transaction_type:
subscription only:
reference_number:
recurring_frequency: (weekly, monthly)
recurring_start_date:
recurring_amount:
amount:
currency:
locale: (en-us, th-th, ja-jp)

bill_to_forename:
bill_to_surname:
bill_to_email:
bill_to_phone:

bill_to_address_line1:
bill_to_address_line2:
bill_to_address_city:
bill_to_address_state:
bill_to_address_country:
bill_to_address_postal_code: