Extrinsic 39257-1

{
  "heartbeat": {
    "blockNumber": 39256,
    "sessionIndex": 654,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xb2241316528e5f9fd301f940a238a19b0a2ac6906168b505748a0766e3883341edecdc0e609f3e190b4d02d5ade2cb484b614f3dc1282789048340bdf717da8b"
}