Extrinsic 16532-1

{
  "heartbeat": {
    "blockNumber": 16531,
    "sessionIndex": 275,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x303105a88636ba3a91c5592519c4c5cfa36303263fac0c4dbaa5c8e2e0c7522adc0a657dc4f293ce267a5b1e030a898825cf7a496973833d5b3c20b3da4dd282"
}