Extrinsic 28345-1

{
  "heartbeat": {
    "blockNumber": 28344,
    "sessionIndex": 472,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xccf9fa8e8f0c96fd4ba5903d45a0391ca7fca621f443e9ddf6e744bd15f354395739aa8dc58bf01c1dab3fc13d382cf8337eca06d7252f21a514ca52eb2efa8c"
}