SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000000c5e8160ed510415c26881cbd8a6338b1a32b4cea501ccebdf78ad2dc8014e995720958c0478f783a3480f70a431b19f96293e18656a7111be48868792c1d383f