Extrinsic 54881-1

{
  "heartbeat": {
    "blockNumber": 54880,
    "sessionIndex": 914,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x12529645e97aa329c8e463d0c636492ffd54404b276ed5b74b2ea9bd62a09a146e22fe158bb875820795b4985cd1d80739c35b954a5acd9ea5b3ac2ab454ec87"
}