Extrinsic 7569-1

{
  "heartbeat": {
    "blockNumber": 7567,
    "sessionIndex": 126,
    "validatorsLen": 4,
    "authorityIndex": 2
  },
  "signature": "0xd6290c2c14a5e5d825e3785e5bca4585b705c0a73497b0797cb270994565d3070d61500e08c853ffe4a19880e97e975051eff3224f111b32a1b827e0c00b158b"
}