SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000002fc58d93079bcddebd4990a30e7eb4e0a27453b8114264dd11b55ffab7a26e5673f2c57f9816ac6f8f796cc665a54007b99e1863a1feb3da9b2b77586eb48a3c8