TokensPurchased (uint256 , address , uint256 )
[topic 0]:0xaf357506555a8fdf38c81d9a8fa2c6bca372e817f179cf596c9645902a927aea
[topic 1]:0x0000000000000000000000000000000000000000000000000000000000000002
0x0000000000000000000000002497ad196e589baa6edf6618430ebe52fbcb894d0000000000000000000000000000000000000000000000000000000000000001