Extrinsic 13279-1

{
  "heartbeat": {
    "blockNumber": 13277,
    "sessionIndex": 221,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0x1034fa6312fbb24a382ef38301dd10ae1c4233ac11cb99a67fd6a7ec79fb1d49692e2ae41961de721d76c104f34e5c3753abe7ca5925310bfd317694b4693c83"
}