Extrinsic 16429-1

{
  "heartbeat": {
    "blockNumber": 16427,
    "sessionIndex": 273,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x4acd904ca57ffade208cbb89d1bd80009ef111c4986b8527c4319ea2c92cc11846b96f57e9725b0d7630a6ee38949066702f290821019285ba2100c178e8b387"
}