curl --location 'https://open.echotik.live/api/v3/echotik/batch/cover/download?cover_urls=undefined' \
--header 'Authorization: Basic <encoded-value>'{
"code": 0,
"message": "success",
"data": {
"source_cover_url1": "dest_cover_url1",
"source_cover_url2": "dest_cover_url2",
"source_cover_url3": "dest_cover_url3"
}
}