Extrinsic 76699-1

{
  "heartbeat": {
    "blockNumber": 76698,
    "sessionIndex": 1278,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xf83b13e70a66b0f0f3ada875ad912d85809878fdb200642314802c85ef7d083a5fca5c3901215141990a8c28e939b83144b4a0b7ca29b4e4a5047914a93c4980"
}