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": {
      "position": 123,
      "notification_target_params": [
        {
          "id": "<string>",
          "type": "team",
          "team_members": "all"
        }
      ],
      "delay": 123,
      "paging_strategy_configuration_strategy": "default",
      "paging_strategy_configuration_schedule_strategy": "on_call_only",
      "escalation_policy_path_id": "<string>"
    }
  }
}
'

{
  "data": {
    "id": "f15839d5-a088-4cbc-97f8-a6ac98aa221d",
    "type": "escalation_levels",
    "attributes": {
      "escalation_policy_path_id": "4e8b30b6-7022-4697-b4af-a0fd6e7f80ce",
      "position": 1,
      "delay": 2,
      "escalation_policy_id": "2e4d5704-eac9-4009-9508-83edc4e1cf9a",
      "paging_strategy_configuration_strategy": null,
      "paging_strategy_configuration_schedule_strategy": null,
      "created_at": "2026-01-14T20:18:52.897-08:00",
      "updated_at": "2026-01-14T20:18:52.897-08:00",
      "notification_target_params": [
        {
          "id": "298",
          "type": "user",
          "team_members": "all"
        },
        {
          "id": "9a28be91-728a-4bdb-a611-f8c3a53ec807",
          "type": "schedule",
          "team_members": "all"
        },
        {
          "id": "CX21345",
          "type": "slack_channel",
          "team_members": "all"
        }
      ]
    }
  }
}