curl --request POST \
  --url http://localhost:6699/api/v1/thumbnails \
  --header 'Content-Type: application/json' \
  --header 'X-License-Key: <api-key>' \
  --data '
{
  "cache_dir": "<string>",
  "requests": [
    {
      "media_path": "<string>",
      "time_seconds": 123
    }
  ]
}
'

{
  "thumbnails": [
    {
      "thumbnail": "aSDinaTvuI8gbWludGxpZnk="
    }
  ]
}