Extrinsic 19571-1

{
  "heartbeat": {
    "blockNumber": 19569,
    "sessionIndex": 326,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x94430da5201583f31a35e1a96ca1bcf7e6d76f02283651ba8d4eb764dcb1dd584ebdbe35164066856637fee1adfb0a3d1e8b5ade408e3e269a892f61d3479384"
}