フォルダの電子すかしを適用または更新します。
curl -i -X PUT "https://api.box.com/2.0/folders/4353455/watermark" \
-H "authorization: Bearer <ACCESS_TOKEN>" \
-H "content-type: application/json" \
-d '{
"watermark": {
"imprint": "default"
}
}'
{
"watermark": {
"created_at": "2012-12-12T10:53:43-08:00",
"modified_at": "2012-12-12T10:53:43-08:00"
}
}