Optional Fields for Adding a Default Payment Instrument Using Instrument Identifier Using the REST API

bankAccount.type
billTo.address1
billTo.address2
billTo.aminstrativeArea
billTo.company
billTo.country
billTo.email
billTo.firstName
billTo.lastName
billTo.locality
billTo.phoneNumber
billTo.postalCode
buyerInformation.companyTaxID
buyerInformation.currency
buyerInformation.dateOfBirth
buyerInformation.personalIdentification.id
buyerInformation.personalIdentification.issuedBy.administrativeArea
buyerInformation.personalIdentification.type
card.expirationMonth
card.expirationYear
card.issueNumber
card.startMonth
card.startYear
card.type
card.useAs
card.tokenizedInformation.requestorID
card.tokenizedInformation.transactionType
instrumentIdentifier.id
processingInformation.billPaymentProgramEnabled
merchantInformation.merchantDescriptor.alternateName