Extrinsic 55587-1

{
  "heartbeat": {
    "blockNumber": 55585,
    "sessionIndex": 926,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x906f99f6ff21a2a166bfc9165de4e5ce84f519bea70d3c006a782dd34179d4479eb600eccdafce8316ab7ac83753613894706b65c3e878615baed7e92f997484"
}