curl --request GET \
--url 'https://YOURSITE.konstant.ly/openapi/v1/courses/123' \
--header 'X-API-KEY: 1qaz2wsx3edc4rfv1qaz2wsx3edc4rfv'

{
    "id": 123,
    "name": "Course name",
    "annotation": "Course annotation",
    "isDraft": false,
    "createdAt": 1507807711,
    "updatedAt": 1507808372,
    "publishedAt": 1508225229,
    "image": {
    "id": 1234,
    "original": "http://example.com/images/original/1234.jpg",
    "mini": "http://example.com/images/mini/1234.jpg",
    "small": "http://example.com/images/small/1234.jpg"
},
    "description": "Detailed course description",
    "attachedFiles": [
{
    "name": "myfile.txt",
    "size": 123,
    "url": "http://example.com/files/myfile.txt",
    "mime": "text/plain"
}
    ]
}