Extrinsic 55127-1

{
  "heartbeat": {
    "blockNumber": 55126,
    "sessionIndex": 918,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x1a6c6ea189a34e05ad1195faa9471efea620cd8ef63933875daf06d1e81c5b3ee859762c5f0f43bbd9054001dc0a9d04a4c960f7e1245608017287db39a43a80"
}