Extrinsic 20836-1

{
  "heartbeat": {
    "blockNumber": 20835,
    "sessionIndex": 347,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xbe0b73619d90f22a8da0bbc050c577b0860145f8634776698abf207b90696a3c7423d0a04bf27b2eb6595c57dac70237d753ebb4bc4fed61385bc1b741c8d18e"
}