Extrinsic 16708-1

{
  "heartbeat": {
    "blockNumber": 16706,
    "sessionIndex": 278,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x8e314eb4e6e6936d38b2b718ba82a841ffabd2c1a05f9efbe7db9fd2c6fcab1ce646349c6f2d42a7512f525480fe4ca581d89de07804bc020e38f138721d618f"
}