Extrinsic 6649-1

{
  "heartbeat": {
    "blockNumber": 6647,
    "sessionIndex": 110,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x1c431a88a347a6ac0b2967ea1563038e155555b830f92ae8e80b50500d178469bf4729b6b1bf452cdba6ea6f0b639d28914ecc04ab53f94a831f4ed0212df08d"
}