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    "name": "Aarav",
    "signup_date": "2025-01-05",
    "referred_by": null,
    "address": {
      "city": "Bengaluru",
      "pincode": "560001"
    },
    "tags": []
  },
  {
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    "name": "Diya",
    "signup_date": "2025-01-12",
    "referred_by": 1,
    "address": {
      "city": "Mumbai",
      "pincode": "400001"
    },
    "tags": [
      "referral"
    ]
  },
  {
    "customer_id": 3,
    "name": "Kabir",
    "signup_date": "2025-02-03",
    "referred_by": null,
    "address": {
      "city": "Delhi",
      "pincode": "110001"
    },
    "tags": []
  },
  {
    "customer_id": 4,
    "name": "Meera",
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    "address": {
      "city": "Bengaluru",
      "pincode": "560034"
    },
    "tags": [
      "referral"
    ]
  },
  {
    "customer_id": 5,
    "name": "Rohan",
    "signup_date": "2025-03-08",
    "referred_by": null,
    "address": {
      "city": "Pune",
      "pincode": "411001"
    },
    "tags": []
  },
  {
    "customer_id": 6,
    "name": "Sana",
    "signup_date": "2025-03-15",
    "referred_by": null,
    "address": {
      "city": null,
      "pincode": null
    },
    "tags": []
  },
  {
    "customer_id": 7,
    "name": "Vikram",
    "signup_date": "2025-04-01",
    "referred_by": 3,
    "address": {
      "city": "Delhi",
      "pincode": "110017"
    },
    "tags": [
      "referral"
    ]
  },
  {
    "customer_id": 8,
    "name": "Zoya",
    "signup_date": "2025-04-10",
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    "address": {
      "city": "Hyderabad",
      "pincode": "500001"
    },
    "tags": []
  }
]