Extrinsic 28581-1

{
  "heartbeat": {
    "blockNumber": 28579,
    "sessionIndex": 476,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xecab21775245db954e2cae7781d515ad33b3a538ee9d3c15be39669a84a022602297ab75721b5907d87b8f400a602b7da7178a1b06edb6f10075f61f3e5d0284"
}