{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "683609933",
    "entityType": "User",
    "nonce": "0x687904d62ed7948b61ffb5ef772a5db9fe56d8fa70fe2c78759505e33f13a535",
    "signature": "0x06c69bf25a072e287f4874a6a8de9f98d1be6e8f1dcab4566db3a4b1390473620c5d77ca419faf86d9c6765ea4552e76c0bd9e2f5897300bd4842127193e6f201b",
    "signer": "0x12EaF77464824447aA995e75Dd707B3e5246be9C",
    "userId": "409175645"
  }
}