Extrinsic 15748-1

{
  "heartbeat": {
    "blockNumber": 15747,
    "sessionIndex": 262,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x0c05e3303d7be52dd60f4dd82218cf901bef774f457ff208b2ea18a5dd0c5343cc05e1abb6c3e0f09c6155f1398ee3076daba4abaee0135a458e452837d7358b"
}