{
  "bankName": "Guaranty Trust Bank",
  "bankAccountName": "ACME LTD",
  "bankAccountNumber": "0123456789"
}

curl -X PUT "https://api.cngn.co/v1/api/bank-account" \
  -H "Authorization: Bearer YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  -d '{
    "content": "<base64 AES-256-CBC ciphertext of the plain body>",
    "iv": "<base64 16-byte IV>"
  }'

{
  "status": 200,
  "message": "Bank account updated successfully",
  "data": {
    "bankName": "Guaranty Trust Bank",
    "bankAccountName": "ACME LTD",
    "bankAccountNumber": "0123456789"
  }
}