Extrinsic 43388-1

{
  "heartbeat": {
    "blockNumber": 43386,
    "sessionIndex": 723,
    "validatorsLen": 4,
    "authorityIndex": 3
  },
  "signature": "0x129d5a6c3d1bea5697faf70d6003ff0f658d4841f92a9109428709ab72d6fb715fa2bb04b85ed387b9cdc2f6bff80e2fb9784a1ea2522559606610087047de8c"
}