curl -X POST https://api.yourservice.com/api/v1/step3/store-verification-items/session/email \
  -H "Content-Type: application/json" \
  -d '{
    "sessionToken": "f47ac10b-58cc-4372-a567-0e02b2c3d479",
    "email": "newemail@example.com"
  }'

{
  "success": true,
  "message": "Email updated successfully"
}