{
    "criteria": [
      {"field": "basicDetailsFilled", "operator": "EQUALS", "value": "completed"},
      {"operator": "OR", "conditions": [
        {"field": "paymentStatus", "operator": "IN", "value": ["online_completed", "offline_completed", "completed"]},
        {"field": "isFreeSeat", "operator": "EQUALS", "value": true}
      ]}
    ],
    "message": "Registration is completed when basic details and payment are submitted."
  }