Extrinsic 393440-1

{
  "heartbeat": {
    "blockNumber": 393439,
    "sessionIndex": 6557,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xa650fc779da4ab9410ddc607db6d97f360074f65c32d626317a84cabd6cdb428e0819b9c711ac3a39c7ed811f221e04b5f7e1e1d8c1e077528279920ce84bd82"
}