curl --request POST \
  --url https://us.getconvoy.cloud/api/v1/projects/{projectID}/subscriptions/{subscriptionID}/filters/test/{eventType} \
  --header 'Authorization: <api-key>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "payload": "<unknown>"
}
'

{
  "message": "<string>",
  "status": true,
  "data": {
    "is_match": true
  }
}