Extrinsic 151302-1

{
  "heartbeat": {
    "blockNumber": 151301,
    "sessionIndex": 2521,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x248a42589a0ae3f5803d02992a424ba8a4305a9ccea339a7380156d214614666e4809499fb1438073cabf091c94e3f90dc17e9254970e0edc8f1d4505a2d3083"
}