Extrinsic 31909-1

{
  "heartbeat": {
    "blockNumber": 31907,
    "sessionIndex": 531,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xb48ef1808bd352455a37aad634c0cfe0b4353a42cf35932f845b5f4740f303407f32161d5c5ac217a0efb5aae8b094845a17c3dd8e8f7928551990a70acb9283"
}