{"tiers":[{"level":0,"name":"Base","t1_rate_bps":1000},{"level":1,"name":"Bronze","t1_rate_bps":1000},{"level":2,"name":"Silver","t1_rate_bps":1000},{"level":3,"name":"Gold","t1_rate_bps":1000},{"level":4,"name":"Platinum","t1_rate_bps":1000},{"level":5,"name":"VIP","t1_rate_bps":1500}],"t2_rate_bps":300,"t3_rate_bps":200}