curl --location 'https://api.treli.co/v1/subscription_items' \
--header 'Authorization: Basic <encoded-value>' \
--header 'Content-Type: application/json' \
--data '{
"subscription": "string",
"quantity": 1,
"unit_price": "20000.00",
"price": "price_1Q8VwAGkNzLGa86BS12312"
}'{}