Extrinsic 17788-2

{
  "heartbeat": {
    "blockNumber": 17786,
    "sessionIndex": 296,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x86475485ea1a4032cf6e185f973ac64f186c8e4b5851ba4e88c962ed72af466a8960e27c108f620d3322b89bc88aae837caddbf0680b3e959c342f713f9e1081"
}