curl --request POST \
  --url https://api.bibigpt.co/api/v1/channels/subscribe \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "channelUrl": "<string>",
  "author": "<string>"
}
'

{
  "channelId": "<string>",
  "fellBack": true,
  "fallbackReason": "<string>"
}