Extrinsic 60708-1

{
  "heartbeat": {
    "blockNumber": 60707,
    "sessionIndex": 1011,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x4e35fde88242e82cac0f531be9a7790171890ea4ba5963405e7e1619a1760521cf022f150844bc51b3f91019a5419294afee00005782d769be1bc16e2afb4481"
}