{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "745004514",
    "entityType": "User",
    "nonce": "0x4e2907dab11536888b6e1e54f09a33bcd93bc747904c85ee30e8f43059aa2753",
    "signature": "0x829cf5a2d0c8a08f168eb6f31ff3083fbfac34ba44b56439e548573bb88ce91236da0fa25dacc36b5f1ffbf71327ceceb9e8cfc6ceb962d80ec5dfa4ae2e3c9f1c",
    "signer": "0x21370B7a703524cC2941323C2c960224021F8D56",
    "userId": "986168993"
  }
}