Extrinsic 55697-1

{
  "heartbeat": {
    "blockNumber": 55696,
    "sessionIndex": 928,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x4e0f8b3e0edc78507961a274933dfcb710fc56900592d25f1db260e924e6290920d65095cbe0b9105d64b5e4247ccbef735d20fa8060bac9efe108ad104c3183"
}