What should be value in Common Name while generating CSR

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What should be value in Common Name while generating CSR

Currently, we are developing a solution using below API

1. Card Number Validation: Payment Account Attributes Inquiry (PAAI) - Funds Transfer Attributes Inquiry API (https://developer.visa.com/capabilities/paai/reference#paai__paai)
2. OCT Transaction Authorization: PushFundsTransactions POST (https://developer.visa.com/capabilities/visa_direct/reference#visa_direct__funds_transfer__v1__pushf...)
3. Query Status of an OCT Transaction: TransactionQuery (https://developer.visa.com/capabilities/visa_direct/reference#visa_direct__query)

While we are getting prepared for going line on that case we have to generate CSR and to generate CSR according to this doc (https://developer.visa.com/pages/going-live#certificate_signing_request) we have to put values in Common Name

But as we are not using any callback URL on that we are confused with what information we should put in this section.

 

One more query while generating JKS what should be the ideal expiry date of JKS and how to set that value.