Extrinsic 77478-1

{
  "heartbeat": {
    "blockNumber": 77477,
    "sessionIndex": 1291,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xaa89dbcb3405def833dd4c1f7e27ac67b3519412fe2c518a9c4ca5408311cb269ec4cef37d3071e77268f620d78f04f3bd9dc8f23ac92d25b3b5b9c9f7ef868f"
}