[
  {
    "spec_no": "ES-001",
    "event_name": "purchase",
    "param_key": "amount",
    "value_type": "number",
    "is_required": true,
    "min_sdk_ver": "8.0.0"
  },
  {
    "spec_no": "ES-002",
    "event_name": "purchase",
    "param_key": "currency",
    "value_type": "string",
    "is_required": true,
    "min_sdk_ver": "8.0.0"
  },
  {
    "spec_no": "ES-003",
    "event_name": "purchase",
    "param_key": "order_id",
    "value_type": "string",
    "is_required": true,
    "min_sdk_ver": "8.0.0"
  },
  {
    "spec_no": "ES-004",
    "event_name": "sign_up",
    "param_key": "method",
    "value_type": "string",
    "is_required": true,
    "min_sdk_ver": "7.5.0"
  },
  {
    "spec_no": "ES-005",
    "event_name": "sign_up",
    "param_key": "referrer",
    "value_type": "string",
    "is_required": false,
    "min_sdk_ver": "7.5.0"
  },
  {
    "spec_no": "ES-006",
    "event_name": "view_item",
    "param_key": "item_id",
    "value_type": "string",
    "is_required": true,
    "min_sdk_ver": "7.0.0"
  },
  {
    "spec_no": "ES-007",
    "event_name": "view_item",
    "param_key": "price",
    "value_type": "number",
    "is_required": false,
    "min_sdk_ver": "7.0.0"
  },
  {
    "spec_no": "ES-008",
    "event_name": "app_open",
    "param_key": "session_id",
    "value_type": "string",
    "is_required": true,
    "min_sdk_ver": "8.0.0"
  },
  {
    "spec_no": "ES-009",
    "event_name": "add_to_cart",
    "param_key": "item_id",
    "value_type": "string",
    "is_required": true,
    "min_sdk_ver": "7.0.0"
  },
  {
    "spec_no": "ES-010",
    "event_name": "add_to_cart",
    "param_key": "quantity",
    "value_type": "integer",
    "is_required": true,
    "min_sdk_ver": "7.0.0"
  },
  {
    "spec_no": "ES-011",
    "event_name": "app_open",
    "param_key": "is_first_open",
    "value_type": "boolean",
    "is_required": false,
    "min_sdk_ver": "8.0.0"
  },
  {
    "spec_no": "ES-012",
    "event_name": "purchase",
    "param_key": "paid_at",
    "value_type": "timestamp",
    "is_required": false,
    "min_sdk_ver": "8.0.0"
  }
]