{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "334323",
    "entityType": "User",
    "nonce": "0x1bc755ddcbc7d964f36848b5a1e9c39b27a4fce551b0d7fee3f74c545ebb8f55",
    "signature": "0xf28824231294f9ac2d62ee33276c9da9db7307170b9c17c77e413bb47d2d2dd743e024f8383caf6b6fc6edfb4697ebf456d9a56f7168493d43d2aafac5b258171b",
    "signer": "0xDf2ffE41EC259B85B3F9C88700b293499D4Ae6C5",
    "userId": "339350040"
  }
}