{
  "goals": {
    "target_roas": 300,
    "target_cpa": 20000
  },
  "campaigns": [
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      "campaign": "여름 세일",
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      "impressions": 50000,
      "clicks": 1200,
      "conversions": 34,
      "revenue": 1050000
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    {
      "campaign": "신규 고객 리타겟팅",
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      "clicks": 540,
      "conversions": 8,
      "revenue": 420000
    },
    {
      "campaign": "브랜드 검색",
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      "impressions": 18000,
      "clicks": 750,
      "conversions": 21,
      "revenue": 510000
    },
    {
      "campaign": "데이터 오류 예시",
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      "impressions": 1000,
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      "conversions": 12,
      "revenue": 150000
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}