Extrinsic 75754-1

{
  "heartbeat": {
    "blockNumber": 75752,
    "sessionIndex": 1262,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x406a358236669a9e23077c9f42c76e9e4d5eb93749a2c993e9b8b9e4678d8d65034cb169e00fd15f9270a94358db56a4f410d89de46826f8868b878571715182"
}