Extrinsic 20562-1

{
  "heartbeat": {
    "blockNumber": 20560,
    "sessionIndex": 342,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x8a9bc110e3e12f6fae9659875a9323417ade59c0cade1b84feda0ac349358f3a92de5897e3ac40c05fed5d66a4e29c053a84c646cf0cd17661440ec9a9e0718c"
}