{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "143442",
    "entityType": "User",
    "nonce": "0xd0698d66aede0f42496f7cb8e6cff81da5cc1757600a51d816636b0766303a1e",
    "signature": "0xfc012019c51024726c2cbd23aa6ab39667e0255f16b3831dcaf88720ff4f79e57136e113af161a48ce438ce22c7dc8cd5c610e2eeab746028386351fbff445551b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}