curl --location --request POST '/transactions/on-ramp' \
--header 'Idempotency-Key;' \
--header 'Content-Type: application/json' \
--data-raw '{
"customer_id": "7f2a1b2c-1111-2222-3333-aaaaaaaaaaaa",
"amount": "1000.00",
"from_currency": "BRL",
"to_currency": "USDC",
"quote_id": "q-9999-8888-7777-xxxx"
}'{
"id": "t-aaaa",
"type": "ON_RAMP",
"status": "AWAITING_FUNDS",
"customer_id": "7f2a1b2c-1111-2222-3333-aaaaaaaaaaaa",
"from_currency": "BRL",
"to_currency": "USDC",
"amount": "1000.00",
"created_at": "2025-09-17T19:00:00Z"
}