Extrinsic 27020-1

{
  "heartbeat": {
    "blockNumber": 27019,
    "sessionIndex": 450,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xa4dd3ac42c609c473b89e62f8dbd5b2c7983a20c4a1107dbcf08350f1efd8d64e77a09c83f301ee74f15e6dac5c555d69c20b4cf853e91ef496c9f72e97ff38c"
}