curl --request PUT \
  --url https://api.vantage.sh/v2/anomaly_notifications/{anomaly_notification_token} \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --data '
{
  "threshold": 123,
  "user_tokens": [
    "<string>"
  ],
  "recipient_channels": [
    "<string>"
  ]
}
'

{
  "token": "rprt_alrt_15da34156dca939d",
  "cost_report_token": "rprt_82320a9c1a608f0f",
  "created_at": "2024-04-09T15:05:37Z",
  "updated_at": "2024-04-09T15:05:37Z",
  "threshold": 2,
  "user_tokens": [
    "usr_dff5de2b6aecf042"
  ],
  "recipient_channels": [
    "channel3",
    "channel4"
  ]
}