Extrinsic 19777-1

{
  "heartbeat": {
    "blockNumber": 19775,
    "sessionIndex": 329,
    "validatorsLen": 4,
    "authorityIndex": 1
  },
  "signature": "0xde506bb07e07f2230fcadb14225b9e5f61a61abc421162c8dad459c845574112a07578f1c493764a84f71b47db5fccfa3aff57d665d7dc9e9eb75306a861ed8c"
}