Extrinsic 7541-1

{
  "heartbeat": {
    "blockNumber": 7540,
    "sessionIndex": 125,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xe06a5f7996d9b1b48e1263e7e5acb762085db39a8a209d33fa32748033e73e4bd81590ed4737de3215d530ab30fa2a56083fb8886b4499407d6c202cb925d085"
}