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

{
  "waves": [
    {
      "accessible": true,
      "code": "<string>",
      "date_end": {
        "nanos": 123,
        "seconds": 123
      },
      "date_start": {
        "nanos": 123,
        "seconds": 123
      },
      "id": 123,
      "kind": "<string>",
      "name": "<string>",
      "namespaces": [
        {
          "code": "<string>"
        }
      ]
    }
  ]
}