Extrinsic 2675-1

{
  "heartbeat": {
    "blockNumber": 2674,
    "sessionIndex": 44,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x8496f87baf4b82db1fd48183aea96f0e6eeff6bb655801c079faaac8af582b486a49d7d16b05ab35e576c43e04051f342f2528abdc68e36a77879a3c40f9d08a"
}