curl --request POST \
  --url https://docflow.textin.com/api/app-api/sip/platform/v2/category/sample/batch_download \
  --header 'Content-Type: application/json' \
  --header 'x-ti-app-id: <api-key>' \
  --header 'x-ti-secret-code: <api-key>' \
  --data '
{
  "workspace_id": "1234567890",
  "category_id": "1234567890",
  "sample_ids": [
    "1234567890",
    987654321
  ]
}
'

"<string>"