Extrinsic 72753-1

{
  "heartbeat": {
    "blockNumber": 72752,
    "sessionIndex": 1212,
    "validatorsLen": 1,
    "authorityIndex": 0
  },
  "signature": "0x4426bc6e5a3ba7c5f95abf1190adc9095c2b2d06b78ecfacdff5587c20108c3057ea5a4544c335e4b208345fd85eee279aa54dab7639a3e43a12ebb0de76d981"
}