Extrinsic 28829-2

{
  "heartbeat": {
    "blockNumber": 28828,
    "sessionIndex": 480,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x0ed26e1d93110fdf9d7744d21731bc2306e65340a55e863136649d493af3476b71c42907006615eb7485a4837e42a34a34cd553db46576d1e64c5b2496a3578e"
}