curl --request POST \
  --url https://api.globalwebindex.com/v2/namespaces/filter \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '{
  "namespaces": [
    {
      "code": "<string>"
    }
  ]
}'

{
  "namespaces": [
    {
      "code": "<string>",
      "name": "<string>",
      "parent_namespace_code": {
        "value": "<string>"
      },
      "type": "<string>"
    }
  ]
}