Extrinsic 28281-1

{
  "heartbeat": {
    "blockNumber": 28279,
    "sessionIndex": 471,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x42f4d10c0b73b1a7e82e635313356244f331ac2404566d7a916667ac8c56fd793df9fb7f4612e5877f6eb602456178514006145a193ecd931e2e93b1ce8be281"
}