Extrinsic 5489-1

{
  "heartbeat": {
    "blockNumber": 5488,
    "sessionIndex": 91,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xb0bee746bf5a4d2d6194d3e8e41b82e57064efc8f95231dbc0df9928a8b21f02701ed684e92310aa8c33b2a4dfcfed9e5fde7a8604ed7b9745df074c0af83785"
}