Account @handle of the external contact without the “@” symbol. Special characters must be URL-encoded before using in the endpoint URL (e.g., ^example => %5Eexample).

The unique identifier of the bank account associated with the external contact. This ID is used to specify which bank account the preferred settlement speed update should apply to.

Specifies the preferred speed at which the payment should be settled to the recepient's bank account. This value determines how quickly funds are transferred when the recipient is responsible for any associated fees.