Extrinsic 16729-1

{
  "heartbeat": {
    "blockNumber": 16727,
    "sessionIndex": 278,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x04bc95fbc95d7703f0b0f2ed8a9d5f49784114b56fa2d8a22b65f9ceb1a0a05d165e83d4161440c729c10b5465df1b643e4b1493977a7d4b895d878dd8f20083"
}