DynamicPlaylistFile
DynamicPlaylistFlle ('FileInfo.Type' property set to "DynamicPlaylist") is derived from the 'StoredFile' structure, and is used to reference dynamic playlists existing in BSN by ID. See the example below (your values will vary for all but "type"):
{
"type": "DynamicPlaylist", // [string], structure data type visible only in JSON representation and used by de-serializer to determine expected property set of this object instance
"name": "My First Dynamic Playlist", // [string]
"size": 912, // [uint]
"hash": "SHA1:E7BA1A1668AB68E6A0090A0A950D43A25A316D8E", // [string]
"creationDate": "2017-01-15T23:46:46.287Z", // [DateTime]
"lastModifiedDate": "2018-01-11T10:17:17.960Z", // [DateTime]
"id": 31711, // [int]
"path": "http://localhost:8081/Content/DynamicPlaylists/My First Dynamic Playlist.xml" // [URI]
}