curl --request PATCH \
  --url https://test-api.sandbox.co.in/bank/virtual/accounts/{account_number} \
  --header 'Content-Type: application/json' \
  --data '
{
  "external_id": "<string>"
}
'

{
  "timestamp": 123,
  "transaction_id": "<string>",
  "data": {
    "@entity": "<string>",
    "account_number": "<string>",
    "ifsc": "<string>",
    "bank_name": "<string>",
    "external_id": "<string>",
    "status": "<string>",
    "notes": {
      "test1": "<string>"
    },
    "name": "<string>",
    "created_at": 123,
    "updated_at": 123
  },
  "code": 123
}