Extrinsic 27330-1

{
  "heartbeat": {
    "blockNumber": 27329,
    "sessionIndex": 455,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x721deed0e81fa4e01c3afbbec9e3ae90feb79f17481d627c4fdd175cf185b602fa5ea421626fc1837276441d2d1f09dffad283899b15a3d2c5f4be0bb2806d8e"
}