curl --request POST \
  --url 'https://api.flashcat.cloud/channel/unsubscribe/rule/list?app_key=' \
  --header 'Content-Type: application/json' \
  --data '
{
  "channel_id": 1001
}
'

{
  "request_id": "01HK8XQE3Z7JM2NTFQ5YJ8P9R4",
  "data": {
    "items": [
      {
        "account_id": 2451002751131,
        "channel_id": 5967964835131,
        "priority": 0,
        "rule_name": "Drop test alerts",
        "description": "",
        "filters": [
          [
            {
              "key": "data_source_id",
              "oper": "IN",
              "vals": [
                "6113996590131"
              ]
            }
          ]
        ],
        "status": "enabled",
        "rule_id": "69bcc530b9e63df36603e421",
        "updated_by": 3790925372131,
        "created_at": 1773978928,
        "updated_at": 1773978928
      }
    ]
  }
}