curl --request GET \
  --url https://{cluster}.voucherify.io/management/v1/projects/{projectId}/custom-event-schemas/{customEventSchemaId} \
  --header 'X-Management-Id: <api-key>' \
  --header 'X-Management-Token: <api-key>'

{
  "id": "ms_f1r5Tm3ta6a4a5ch3ma",
  "related_object": "order",
  "properties": {
    "published": {
      "type": "boolean",
      "optional": true
    }
  },
  "created_at": "2024-04-29T11:25:44.458Z",
  "object": "custom-event-schema"
}

{
  "code": 401,
  "message": "Unauthorized",
  "key": "unauthorized"
}

{
  "code": 402,
  "message": "Payment required",
  "details": "Your current plan does not include a feature required to perform this operation.",
  "key": "missing_required_feature"
}

{
  "code": 404,
  "message": "Resource not found",
  "details": "Cannot find project with id proj_2F3txY7"
}