Extrinsic 55424-1

{
  "heartbeat": {
    "blockNumber": 55423,
    "sessionIndex": 923,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xa2ff505029bfc6063c0cf443392e813b56fe7c7b1c330a28271be4ac23b3bb1222e9f1ea14685efe6097fab189ce124cfc00b7b5b451276ddecc96dbfc103989"
}