Extrinsic 45345-1

{
  "heartbeat": {
    "blockNumber": 45343,
    "sessionIndex": 755,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x344f77f1d9b947b8fa5f46e5baa3cf0625dd4093a9947f78ac048d50e06b604cd430421f17eedfc2a668c67286207cf674210c9672613d815280532b8ee45d8d"
}