SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x00000000000000000000000000000000000000000000000000000000000000007285e20f02b02c6aee8fc68ea6f35a010858c71798677842ec790e33715aafd999c7435888ef28ff6643f94dc531854ad7f4a988e761d313b2eb0a5073f7d0a3