Extrinsic 159872-1

{
  "heartbeat": {
    "blockNumber": 159871,
    "sessionIndex": 2664,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x94ec6820b48568694e399f39d3f6d15a7707436ff32e738c9983b6acc93292783c54a8f325ec015ed39b4183e7c0e4eb7151f56351caa9fbbd490ad91b927b8a"
}