Extrinsic 2605-1

{
  "heartbeat": {
    "blockNumber": 2603,
    "sessionIndex": 43,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x9ce2ac82573693839c79ff1d48b2f2d288d2ee04b889683fb6d5d79852cbc22f1199d199f29333f2b4b2810af77805725b2b94a0490ded288a13b0cd9bf8898b"
}