SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x00000000000000000000000000000000000000000000000000000000000000006caef1c951aac5f9cd4709e24c036c82620e13630956611ffd90f53524e5ac8b8fadc0c0c3ec397a24df09f8a52da05f56c1a61b52d7c65062911ca2a9c44c61