Extrinsic 26979-1

{
  "heartbeat": {
    "blockNumber": 26978,
    "sessionIndex": 449,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x24a0d30327d3dad713e821c608bca1087ec4358bcdee722f97c9b843d4a30d61e46f15ba37d112d434ebdaf1bd2c700a4f34a2d06bc5037d92f55009aaab2a80"
}