{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3333",
    "entityType": "User",
    "nonce": "0x43b6b74b02dd84b408de982048708803cfbaf5c2dd321a652aa2131af442a94f",
    "signature": "0xa43684bb1e0cef5da076ce4373c4844aa594ed4210882ba447d0e566804603e4314dcda6e6e2b83d91d86d68dd54fb4a227558bb609ca33559a3cc76204aff5a1b",
    "signer": "0xD7Db519a2A03374B0548c02822bE88402aef1E5b",
    "userId": "715241773"
  }
}