Extrinsic 39735-1

{
  "heartbeat": {
    "blockNumber": 39733,
    "sessionIndex": 662,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xf4f7b9791bebd52c9965e009abf5d6f47ad01fb2bba4b5e9f2d947f580c14e01b1925d31c6307efc322576d3d53d559a4d2e61d77d27c1da8df9e4f5c480818b"
}