I read this page, and I can not understand this line.
https://docs.soliditylang.org/en/develop/abi-spec.html#examples
0x0000000000000000000000000000000000000000000000000000000000000060 : the location of the data part of the first parameter (dynamic type), measured in bytes from the start of the arguments block. In this case, 0x60.
How to calc 0x60
?
and any useful resource of ethereum transaction structure?