Extrinsic 2686-1

{
  "heartbeat": {
    "blockNumber": 2684,
    "sessionIndex": 44,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x10c669e40ab9bd058d447889897689485b596531473cbbd6fe29e2ff3311ff4eba81476255dda658a0478c0b916a0b2c8ddf6ad9c0d37e847d46bfb934963381"
}