post https://sandbox-platform.jupico.com/v1/provisioning/submerchant/update
Updates an existing submerchant. Note: The submerchant must be in 'review' status to be updated. Once activated, it cannot be modified. All fields in identity.business are optional. feesTemplateId and payoutBankAccounts are optional, but if payoutBankAccounts is provided, accountRouting, accountNumber, accountType, and nameOnAccount are required.