PurchaseEvent (uint256 , address , uint256 )
[topic 0]:0xbec109f7ee137de661c6887caa96653c0545050a9908a3b6eb5190440bbec864
[topic 1]:0x0000000000000000000000008fac8a268fa4bd585961d7514bc6c3cad91a354e
0x000000000000000000000000000000000000000000000004c53bad6692f900000000000000000000000000000000000000000000000000000000000060423b90