Extrinsic 54705-1

{
  "heartbeat": {
    "blockNumber": 54704,
    "sessionIndex": 911,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x42b4f358b86363e1ed256cba81f6abfdc7355e08184f5340793deace82343b07efba56cc94656dce3694328f42a2589b075dbd12ef69ed4eb31e2d143ff03588"
}