Extrinsic 21769-1

{
  "heartbeat": {
    "blockNumber": 21767,
    "sessionIndex": 362,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x5e6901c080185b2341118522f72261c7fcd71fe9dd1a1f8f26197e8f03f5a33d440ac04efd5c25a148607df9cae2c149d4e9e7bf08f67663b67c37b36f2d3388"
}