SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000000ae7238a288d4d17b27e3f9c8494f4e4135d5075ca73c08916dd1693d0f1eb920fce21b30c78516a54980f829d96d2a71ac8ad00612cb3b0d6c14ba25278ae385