Extrinsic 27874-1

{
  "heartbeat": {
    "blockNumber": 27873,
    "sessionIndex": 464,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xda4d3d38e0f745aa7d0c972400db95ee62058983c8fa065e71202386fc12a9631a189b9fc90eb9b847f06472c764842432c4e95f92f73bdb9601040c1ec1c289"
}