Extrinsic 39814-2

{
  "heartbeat": {
    "blockNumber": 39812,
    "sessionIndex": 663,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x464374a3c125c91edb3e7c659bda23b8ac8c93fc37725132bd9046587f515923be13bb9c9ed452b4d51f0255da007db5986b3843a5701e5ca58f3d35d714c382"
}