curl --request POST \
  --url https://api.parcha.ai/api/v1/uploadB64Document \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '{
  "b64_document": "<string>",
  "document_name": "<string>"
}'

{
  "url": "<string>",
  "expiration": "2023-11-07T05:31:56Z"
}