SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x000000000000000000000000000000000000000000000000000000000000000096e53267ae35986b8373dc71a8ec357a9b1acff74bd8407139b919d3a64a56f6f13541658abdc953f81f0e98d6a220b3e32a9fe5ab80f48f7dfaaa1ff4962fcf