Extrinsic 75408-1

{
  "heartbeat": {
    "blockNumber": 75407,
    "sessionIndex": 1256,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x8a154efcfe7c58fefa6b7b078b8c946a5d81e75a82092daf198d69bbe366d2282674475834cdc153dc088e26f043fa78f6aea1ef8cfd1488d26f4c91aae9ea83"
}