emailstring<EmailAddress>Requiredbilling_entity_codestring<BillingEntityCode>Optionaladdressobject<Address>Optionalpayment_method_tokenstring<PaymentMethodToken>Optionalpayment_method_typeenum<PaymentMethodType>Optionaltaxesobject<TaxResponse>[]Optionalcodestring<TaxCode>Optionalmetadataobject<CustomerMetadata>[]Optional