Extrinsic 45744-1

{
  "heartbeat": {
    "blockNumber": 45742,
    "sessionIndex": 762,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xb63b9912c864bbe2c9156bf1749dd4cd94e70b1492006c704072010098c352236beb120e916341c6afd2a2d9d5ab1596c33865615f6f5e2b88dd280fbad15e85"
}