SingleDataEvent {
topic1: Contract(CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAFCT4),
topic2: Contract(CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHK3M),
data: String(100),
}
Contract(CAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAD2KM)
single_data {
#[topic] topic1: Address,
#[topic] topic2: Address,
#[data] data: String,
}