SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000000b1f48dcabe5a23c930d9ba42324557623d5ab88f38d02015c1880d49971ccf66bc6c24c908db737a116a1883791a0398135213679fa6641730e3ff55edf8ce43