{
  "fields": [
    {"key": "name", "name": "Name", "type": "text", "required": true, "indexed": true},
    {"key": "target_entity", "name": "Target entity", "type": "text", "required": true},
    {"key": "group_by_field", "name": "Group by field", "type": "text"},
    {"key": "measure_field", "name": "Measure field", "type": "text"},
    {"key": "measure_function", "name": "Measure function", "type": "select", "required": true, "options": ["count", "sum", "avg", "min", "max"]},
    {"key": "status", "name": "Status", "type": "select", "required": true, "indexed": true, "options": ["draft", "published"]}
  ]
}