Extrinsic 16280-1

{
  "heartbeat": {
    "blockNumber": 16279,
    "sessionIndex": 271,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x401575204480b8b4df9e24f501af0bc4dd128b8c309130f1fdde9de2168e9c523f831429bc5da7ee12ca8ef8610edfca0b28920a2e147afa9f20b39693f90482"
}