TokensPurchased (address purchaser, address beneficiary, uint256 value, uint256 amount)
[topic 0]:0x6faf93231a456e552dbc9961f58d9713ee4f2e69d15f1975b050ef0911053a7b
0x0000000000000000000000000000000000000000000000008aa39c121a270000000000000000000000000000000000000000000000000f3b39857d1f88e00000