curl --request POST \
  --url http://localhost:3001/api/v1/elements/tokenize \
  --header 'Content-Type: application/json' \
  --data '
{
  "sessionId": "es_aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa",
  "number": "4242424242424242",
  "expMonth": 12,
  "expYear": 2030,
  "cvc": "123"
}
'

{
  "success": true,
  "data": {
    "id": "<string>",
    "last4": "<string>",
    "brand": "<string>",
    "expiresInSeconds": 123
  }
}