Creates an escalation level for an Escalation Policy

curl --request POST \
  --url https://api.rootly.com/v1/escalation_policies/{escalation_policy_id}/escalation_levels \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/vnd.api+json' \
  --data '{
  "data": {
    "type": "escalation_levels",
    "attributes": {
      "delay": 123,
      "position": 123,
      "paging_strategy_configuration_strategy": "default",
      "paging_strategy_configuration_schedule_strategy": "on_call_only",
      "escalation_policy_path_id": "<string>",
      "notification_target_params": [
        {
          "id": "<string>",
          "type": "team",
          "team_members": "all"
        }
      ]
    }
  }
}'

{
  "data": {
    "id": "b61e6950-ec70-4ae4-8e37-d87e3b194f95",
    "type": "escalation_levels",
    "attributes": {
      "escalation_policy_path_id": "8a3e4cd8-fc34-4820-bfa6-3b8ac48850ec",
      "position": 1,
      "delay": 2,
      "escalation_policy_id": "b7611117-ba9c-4ffc-86c7-5535902fef4a",
      "paging_strategy_configuration_strategy": null,
      "paging_strategy_configuration_schedule_strategy": null,
      "created_at": "2025-07-09T09:07:26.334-07:00",
      "updated_at": "2025-07-09T09:07:26.334-07:00",
      "notification_target_params": [
        {
          "id": "112",
          "type": "user",
          "team_members": "all"
        },
        {
          "id": "74f0a731-ba90-442c-b847-8bfc4e9ffbf3",
          "type": "schedule",
          "team_members": "all"
        },
        {
          "id": "CX21345",
          "type": "slack_channel",
          "team_members": "all"
        }
      ]
    }
  }
}