SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000000d44a41cbf0a2ab4cdb410aaa87e9422b399463fff0410a4b13984dd04f2280d36646339de9f38b58c845db452d599e1b0a0d6cb841c5661f508666bcd819a3c8