curl --request POST \
  --url https://api.getsly.ai/v1/v1/funding/onramp-session \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "wallet_id": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "default_amount_usd": 123,
  "supported_payment_methods": [],
  "return_url": "<string>"
}
'

{
  "data": {
    "session_url": "<string>",
    "expires_at": "2023-11-07T05:31:56Z",
    "session_token": "<string>"
  }
}