Extrinsic 6940-1

{
  "heartbeat": {
    "blockNumber": 6939,
    "sessionIndex": 115,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x5ae35d4605e214737bcdda3df66393011c1876dd6c65483753c7fd1db0e2ae0e9402601283b277869bf7dd04acd7928d566b3072b52fc1068ba05764709f1886"
}