curl --request POST \
  --url https://public-api.cambio-ai.com/async/upload \
  --header 'Content-Type: application/json' \
  --header 'x-api-key: <api-key>' \
  --data '{
  "file_name": "<string>",
  "process_type": "file",
  "extract_args": {}
}'

{
  "file_id": "<string>",
  "presignedUrl": "<string>"
}