curl --request POST \
  --url https://api.sumvin.com/v0/ramp/sessions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "source_amount": 123,
  "source_currency_code": "<string>",
  "destination_currency_code": "<string>",
  "wallet_address": "<string>",
  "country_code": "US",
  "payment_method_type": "<string>",
  "service_provider": "<string>"
}
'

{
  "_links": {},
  "session": {
    "id": "<string>",
    "widget_url": "<string>",
    "token": "<string>",
    "service_provider_widget_url": "<string>",
    "external_session_id": "<string>"
  }
}