Extrinsic 45450-1

{
  "heartbeat": {
    "blockNumber": 45449,
    "sessionIndex": 757,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x1a237cbfb8e43edcfc08d55441789dc254eff40fe742ae64806ab0ef14281640e7669923a1c5e0a022b8cbb8c72e2ff464b694a501ca6eaaab593af6e8a3a787"
}