curl --request POST \
  --url https://api.apexxcloud.com/api/v1/files/multipart/{uploadId}/complete \
  --header 'Content-Type: application/json' \
  --header 'X-Access-Key: <api-key>' \
  --header 'X-Signature: <api-key>' \
  --header 'X-Timestamp: <api-key>' \
  --data '
{
  "parts": [
    {
      "PartNumber": 123,
      "ETag": "<string>"
    }
  ]
}
'

{
  "data": {
    "message": "Multipart upload completed successfully",
    "key": "<string>",
    "location": "https://cdn.apexxcloud.com/f/{access_id}/{path}",
    "size": 123,
    "bucket": "<string>",
    "region": "<string>",
    "content_type": "<string>"
  }
}