Extrinsic 7779-1

{
  "heartbeat": {
    "blockNumber": 7778,
    "sessionIndex": 129,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x327b627db7d5f2c90fa0e422886bb2d2234ffdc0c57ab4a8ea005fb42a3c0916e5b14cc53f15157afd24a9f9969f2964e5207fe252ba32a2fd598e4cd0489f87"
}