Add new subtitles:

Full details:

{
  "video_quality": "plus",
  "tracks": [
    {
      "type": "audio",
      "primary": true,
      "max_channels": 2,
      "max_channel_layout": "stereo",
      "id": "6xn2MGtZcG65BceETBvf1x3DbEbBiOCyCwgDRXptxf4"
    },
    {
      "type": "video",
      "max_width": 1920,
      "max_height": 1080,
      "max_frame_rate": 30,
      "id": "URj9spkGOGd7lrlSKHa97knPCHn5KckXenzAV02QibUk"
    }
  ],
  "status": "ready",
  "resolution_tier": "1080p",
  "recording_times": [
    {
      "type": "content",
      "started_at": "2024-10-24T12:08:33.228Z",
      "duration": 894.475
    }
  ],
  "progress": {
    "state": "completed"
  },
  "playback_ids": [
    {
      "policy": "public",
      "id": "g5N6bUsHsL9crV023NSMuvrwXicip02svfCBb302C7vFjs"
    }
  ],
  "mp4_support": "none",
  "max_stored_resolution": "HD",
  "max_stored_frame_rate": 30,
  "max_resolution_tier": "1080p",
  "master_access": "none",
  "live_stream_id": "H9Kb46pEFTbxV8YNS9mzfhQ01BF7aXaIQMaJQzwKsRvQ",
  "ingest_type": "live_rtmp",
  "id": "nWMbKw41a02D9KrUptu9XaekKKzg01IJIq00Rnrp3P87oI",
  "encoding_tier": "smart",
  "duration": 894.475,
  "created_at": "1729771712",
  "aspect_ratio": "16:9"
}