SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000001b4fa764cb68f5612fcd60cff580cd5de64e368efe2b28818b66d708633186fbea70111542486876efebfb37e998a393be85078be6929f4f959bd234210b793a7