Extrinsic 39386-1

{
  "heartbeat": {
    "blockNumber": 39384,
    "sessionIndex": 656,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xa09c55b229a1a3714c601a33c8c80426e6cb29637ae22349ffc6c3f556fba767cb0e138e196d574cca02f667dcab0e153a8aa29ead9727f3d06a5474c37c4187"
}