Extrinsic 2668-1

{
  "heartbeat": {
    "blockNumber": 2667,
    "sessionIndex": 44,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xc43ba46f4d0ddce3ca7e6723a37adaed4ebf51a4191a7f93443b71d69e27675377b9e1f1b7946c6cec61d59a3c88943dac9ae533cf096f04f8cccdf666794385"
}