curl --request POST \
  --url 'https://api.flashcat.cloud/channel/reorder?app_key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "drag_channel_id": 123,
  "target_channel_id": 123
}
'

{
  "error": {
    "code": "<string>",
    "message": "<string>"
  }
}