Update audio / subtitle track

This endpoint allows you to update an existing audio or subtitle track associated with a media file. When updating a track, you must provide the new track `url`, `languageName`, and `languageCode`, ensuring all three parameters are included in the request. #### How it works 1. Send a PATCH request to this endpoint, replacing `{mediaId}` with the media ID, and `{trackId}` with the ID of the track you want to update. 2. Provide the necessary details in the request body. 3. Receive a response confirming the track update. #### Webhook Events After updating a track, your system must receive webhook notifications: 1. After successfully updating a track, your system must receive the webhook event <a href="https://docs.fastpix.io/docs/transform-media-events#videomediatrackupdated">video.media.track.updated</a>. 2. Once the new track is processed and ready, you must receive the webhook event <a href="https://docs.fastpix.io/docs/transform-media-events#videomediatrackready">video.media.track.ready</a>. 3. Once the media file is updated with the new track details, a <a href="https://docs.fastpix.io/docs/media-events#videomediaupdated">video.media.updated</a> event must be triggered. #### Example Suppose you previously added a French subtitle track to a video but now need to update it with a different file. By calling this API, you can replace the existing subtitle file (.vtt) with a new one while keeping the same track ID. This is useful when: - The original track file has errors and needs correction. - You want to improve subtitle translations or replace an audio track with a better-quality version. Related guides: <a href="https://docs.fastpix.io/docs/manage-subtitle-tracks">Add own subtitle tracks</a>, <a href="https://docs.fastpix.io/docs/manage-audio-tracks">Add own audio tracks</a>