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": "8b75a2cf-0239-4efc-8e17-cecdb5f0aa1d",
    "type": "escalation_levels",
    "attributes": {
      "escalation_policy_path_id": "47989342-1b47-46b1-8b18-82266c3e7a1b",
      "position": 1,
      "delay": 2,
      "escalation_policy_id": "24deed7c-4b3f-4c60-9a81-e84f944f67bf",
      "paging_strategy_configuration_strategy": null,
      "paging_strategy_configuration_schedule_strategy": null,
      "created_at": "2025-08-01T13:25:25.515-07:00",
      "updated_at": "2025-08-01T13:25:25.515-07:00",
      "notification_target_params": [
        {
          "id": "113",
          "type": "user",
          "team_members": "all"
        },
        {
          "id": "37bfc04d-a9e0-4990-96de-c69c5c7ca47c",
          "type": "schedule",
          "team_members": "all"
        },
        {
          "id": "CX21345",
          "type": "slack_channel",
          "team_members": "all"
        }
      ]
    }
  }
}