Extrinsic 7664-1

{
  "heartbeat": {
    "blockNumber": 7662,
    "sessionIndex": 127,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x44bcc899ad92e103f39d998fb71f4b504bdfbac0acf3082163086da1ed20f87b5fcedfe79b3a3f8aa85fe0323ed9cb99e6a4f1040bb0d1a1fac6bdfe0d5afc8f"
}