curl --request POST \
  --url 'https://api.flashcat.cloud/route/upsert?app_key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "integration_id": 6113996590131,
  "cases": [
    {
      "if": [
        {
          "key": "severity",
          "oper": "IN",
          "vals": [
            "Critical"
          ]
        }
      ],
      "channel_ids": [
        3521074710131
      ],
      "fallthrough": false,
      "routing_mode": "standard"
    }
  ],
  "default": {
    "channel_ids": [
      3521074710131
    ]
  }
}
'

{
  "request_id": "01HK8XQE3Z7JM2NTFQ5YJ8P9R4",
  "data": {}
}