Extrinsic 21702-1

{
  "heartbeat": {
    "blockNumber": 21700,
    "sessionIndex": 361,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x8af124329bd38c0a54aa61ebaa91ca856b98ff67b0bd9ad0b641083c23574e506d48f454fd0c755c9a2685c80cdf0b6faf3eaf8b77d13266565802862b8fd38d"
}