Extrinsic 74561-1

{
  "heartbeat": {
    "blockNumber": 74560,
    "sessionIndex": 1242,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0xe4039da28bd69e3830f2ed6a48f5d04ca299194a8e83e932c5af680a585ff660469bb5d420469ca51851a68a320ac86655e1f3b153b038858e65731fb5681a8f"
}