SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000000a6d79f636419aaee297b2963b8901b174c4e635eaaac249bf22b7a802b59ad59f83cec5108ee9c6b06d743ee2234e1f44d404ca1acefa065d95c7d2c19be7f75