curl --request GET \
  --url https://api.example.com/v2/documents/{document_id}/company/

{
  "id": 123,
  "uuid": "3c90c3cc-0d44-4b50-8888-8dd25736052a",
  "signer": {
    "id": 123,
    "name": "<string>",
    "phone": "<string>",
    "email": "jsmith@example.com",
    "type": "company",
    "outer_id": 0
  },
  "created_at": "2023-11-07T05:31:56Z",
  "updated_at": "2023-11-07T05:31:56Z",
  "stages": [
    {
      "id": 123,
      "status_from": 0,
      "status_to": 0,
      "created_at": "2023-11-07T05:31:56Z",
      "meta": "<unknown>"
    }
  ],
  "method": 0,
  "method_allowed": [
    16383
  ],
  "status": 0
}