Extrinsic 172785-1

{
  "heartbeat": {
    "blockNumber": 172784,
    "sessionIndex": 2879,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0x1878d3a44309db1912b74fc49ead8aad807f726b97cc086f3bcb0ba97433de5e3057d076c337a0b519cf0309bd226c2f7a921c48712e2aa42a246679023a8d80"
}