Extrinsic 16999-1

{
  "heartbeat": {
    "blockNumber": 16998,
    "sessionIndex": 283,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x9ea7e4dbef1c93531c23331ada01eeca3469d082caf8f100e5a386f2d58e05131adbd947079efb0c7242027054cfa17db2c8bba8dea5c1bc2daf8d65166e1b82"
}