Extrinsic 40713-1

{
  "heartbeat": {
    "blockNumber": 40711,
    "sessionIndex": 678,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x28d2ac19137f402ad3226208ebef8866089ff8d52d0b23b81d7c1de6a0f3ac1e1210a45544d7e2fad5e7607924914c137e409ab7a2cf4f36df13e5135faaa283"
}