curl --location --request POST '/api/v2/courses//purchase' \
--header 'Content-Type: application/json' \
--data-raw '{
"product_id": "com.example.app.course_premium",
"amount": 29.99,
"receipt": "ewoJInNpZ25hdHVyZSIgPSAi...",
"transaction_id": "1000000123456789",
"package_name": "com.example.app"
}'{
"success": true,
"data": null,
"message": "Success"
}