SigningKeyAdded (index_topic_1address account, uint8 keySlot, bytes32[2] key)
[topic 0]:0x1d84cb7fa5da6303adc54870a915cbf91d2cf642fcc5ce470b79b77467201876
0x0000000000000000000000000000000000000000000000000000000000000003fdcdaaeaae54e3fe002da1e4baf1a9ea1edfedb01954b556a60de831c660d025da9b8bd1cd275433bf13a94d4fb59b4fbb558f54208bf86fa6a76b46a9e416cb