curl --request POST \
  --url https://api.example.com/brokerage-firms/{brokerageFirmId}/documents \
  --header 'Content-Type: application/json' \
  --data '
{
  "name": "<string>",
  "metadata": [
    {
      "key": "category",
      "value": "kbis"
    }
  ]
}
'

{
  "type": "<string>",
  "id": "<string>",
  "url": "<string>"
}