Why does Odnoklassniki return the error "Parameter 'movieId' must be specified" when trying to call the publication widget?

Question

Classmates

The application has been approved, the VIDEO_CONTENT right is present, the video id is correct. Here is the attachment that is passed as a get parameter to the post widget.

attachment = {
  "media": [
    {
      "type": "text",
      "text": u"тест".encode('utf-8')
    },
    {
      "type": "movie-reshare",
      "movieId": "xxxxxxxxxxxx"
    }
  ]
}