{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "353773",
    "entityType": "User",
    "nonce": "0x300f8940361dfe26c6b30fb13a6be717e3f1963b77286b6829ec1bb1d3651491",
    "signature": "0x4489932b948f8c07ff182ae1c6f7307157d9903e7e7b436384c4c15bb2aef98250cc9d6af930eeeb3f9a861f7c4033decddc803dec82ad32b5ecb28082a757441c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}