Extrinsic 26776-1

{
  "heartbeat": {
    "blockNumber": 26774,
    "sessionIndex": 446,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x68c4702d64b65d979f4adb02c38f9eff26faaa0ba0c80b1181127b9a0d87c1393ff65a15282ca03daa865f1c9c27dfbeb4efd965084718f971dc402aa67f3781"
}