Extrinsic 19512-1

{
  "heartbeat": {
    "blockNumber": 19511,
    "sessionIndex": 325,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x0efd3aa9e87ec8bfe4556294ab5d39f69f74bf9fa68f08543ce7118bb0592e56e6f51d30e0b17e6c35c93720fa8e477ccd94ba7fdbc711b67fa990cd89321f82"
}