Extrinsic 28453-1

{
  "heartbeat": {
    "blockNumber": 28451,
    "sessionIndex": 474,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xa6357c09fcd54e17504ad8b95c7a1ac360a44ff898dd8d5e81bfc758521d6c1fb448cbd0040fff082e863c9b2cc0bae064c4b519f59a36b80e2c8121c3681d8e"
}