Extrinsic 13287-1

{
  "heartbeat": {
    "blockNumber": 13286,
    "sessionIndex": 221,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x66ed191c6471e79f8d2c0e4a8c5907ef8a757defe6000348bdd1c949481a3d38e6a48647dc969de3c8ff4ac2cf3e20077922127fe0a77e830910cf5f663ca886"
}