Model: payment

[Optional] Identifier of the sales representative who assisted with the order (max 20 chars).

[Optional] Promotional or affiliate referral code applied at checkout (max 50 chars).

[Optional] Indicates the order is being sent as a gift ("true"/"false").

[Optional] Whether the total will be paid in multiple installments ("true"/"false").

[Optional] Amount of each individual installment payment; positive number.

[Conditional] ISO 4217 currency code for installment amounts; required when isPaymentInInstallments is "true".

[Conditional] Total number of installment payments; required when isPaymentInInstallments is "true".

[Optional] Whether this is a recurring/subscription payment ("true"/"false").

[Optional] Personal message or order instruction associated with the transaction.