Extrinsic 51691-1

{
  "heartbeat": {
    "blockNumber": 51690,
    "sessionIndex": 861,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x901b9c304b7fba24b465c2bd9c521dacda76953276affb6c9ebdc76b297df74c03edfd38b13b5c1016d700d547a49f95dea7e7f3d83a9f915ab615be27b22782"
}