Extrinsic 7760-1

{
  "heartbeat": {
    "blockNumber": 7759,
    "sessionIndex": 129,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0xbe24d21622e224fa5b3851a7c8b22ad4db233f17ee233a382e73b37bebb5820c526182f3d1779748c8be21fd0a6936f8cc42e383b83a9f18262337552c88fa86"
}