[
  {
    "phone_number": "10690001",
    "content": "【运营商】您的验证码 123456，5分钟内有效",
    "received_at": "2026-04-24 11:20:00"
  },
  {
    "phone_number": "10010",
    "content": "余额提醒：当前余额 32.10 元",
    "received_at": "2026-04-24 11:21:00"
  }
]