curl --request PUT \
  --url https://api.ngrok.com/edges/tls/{id}/mutual_tls \
  --header 'Authorization: Bearer <token>' \
  --header 'Content-Type: application/json' \
  --header 'ngrok-version: <ngrok-version>' \
  --data '{
  "id": "<string>",
  "module": {
    "enabled": true,
    "certificate_authority_ids": [
      "<string>"
    ]
  }
}'

{
  "enabled": true,
  "certificate_authorities": [
    {
      "id": "<string>",
      "uri": "<string>"
    }
  ]
}