Extrinsic 55603-1

{
  "heartbeat": {
    "blockNumber": 55601,
    "sessionIndex": 926,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x18800d880e49766e4451d968f41d1e9b6029e3d42a7bf2738eac935fcd9b6f2ca6366046a33a4ab46a5847a3472f8d88d712f6cd6982bb2e31199abf0b94008c"
}