Extrinsic 19179-1

{
  "heartbeat": {
    "blockNumber": 19177,
    "sessionIndex": 319,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x048294bf682dd04f6301e0b57383b45429ec4967e84ec57e2031b9c9e71f91714678950700d80e548cf8c89a8fff394109c472be1507de49898ec6fd7ba8f989"
}