Extrinsic 31305-1

{
  "heartbeat": {
    "blockNumber": 31303,
    "sessionIndex": 521,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x96374b07a50285f3d48e53f2facf7e93527b18817c2b3a31a83313d55af64f7c5962f04c30ac1d15b963c1c23ee3cf80f1b066dac42b379aa3d3fa7538d0cf85"
}