{
 "indexes" : ["Card.id", "Pos.id", "Transaction.fraud_reported"],
 "nodes" : [
   {
     "count_per_worker" : 10000,
     "label" : "Card"
   },
   {
     "count_per_worker" : 1000,
     "label" : "Pos"
   },
   {
     "count_per_worker" : 50000,
     "label" : "Transaction"
   }
 ],
 "compromised_pos_probability" : 0.2,
 "fraud_reported_probability" : 0.1,
 "hop_probability" : 0.1
}