Send JSON to API
You can now send JSON directly to our API.
```
curl 'https://gateway.seven.io/api/sms' \
-H 'Accept: application/json' \
-H 'Content-type: application/json' \
-H 'Authorization: basic YOUR_API_KEY' \
-d '{"to":"+49177777777","text":"Hello world :-)"}'
```
