Extrinsic 16668-1

{
  "heartbeat": {
    "blockNumber": 16667,
    "sessionIndex": 277,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0x84036f465ef7072a53f235b50eaed860dcc7976fb5658fd64b9554d32701c7755112721e23b6ed0d32a0b7ee972c8712e4ab1ae6872f12a08e577c5d0dd63b81"
}