Extrinsic 7307-1

{
  "heartbeat": {
    "blockNumber": 7305,
    "sessionIndex": 121,
    "validatorsLen": 4,
    "authorityIndex": 0
  },
  "signature": "0xc6695f8cce5e08a44ce912d9303d376204c52ec23dd2c7cea1dbfc554efe4f30c7480e515c6f9d52d281d57ade0ffc12881d05286315ce7d7245441b3aca8384"
}