Add or replace a caption track

curl --request POST \
  --url https://convertly.sh/api/video/streams/{id}/captions \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "label": "English",
  "language": "en",
  "content": "<string>"
}
'

const options = {
  method: 'POST',
  headers: {Authorization: 'Bearer <token>', 'Content-Type': 'application/json'},
  body: JSON.stringify({label: 'English', language: 'en', content: '<string>'})
};

fetch('https://convertly.sh/api/video/streams/{id}/captions', options)
  .then(res => res.json())
  .then(res => console.log(res))
  .catch(err => console.error(err));

{
  "error": "<string>",
  "upgradeUrl": "<string>"
}

{
  "error": "<string>",
  "upgradeUrl": "<string>"
}

{
  "error": "<string>",
  "upgradeUrl": "<string>"
}

{
  "error": "<string>",
  "upgradeUrl": "<string>"
}