curl --request POST \
  --url https://api.eflow.team/v1/networks/upload \
  --header 'Content-Type: multipart/form-data' \
  --header 'X-Eflow-Api-Key: <api-key>' \
  --form file='@example-file'

{
  "url": "<string>",
  "filename": "<string>",
  "size": 123
}