Buy (address user, uint256 amount, uint256 price)
[topic 0]:0x1cbc5ab135991bd2b6a4b034a04aa2aa086dac1371cb9b16b8b5e2ed6b036bed
0x000000000000000000000000000000000000000000003c287edc4bf82b44000000000000000000000000000000000000000000000000000000038d7ea4c68000