{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x320c4e8da112445010e1d6792d77612442b71e333406b3741866b567e11cd8ea",
    "signature": "0x445c389f31f2e04c7eb10d3e698285d3e4eeaddff97476fa5edbb82627a83bae79409bffa3e4980edd0cb04b6b5582e2ebf859ed8f33ee29fbb3c96df34026291c",
    "signer": "0x580b8ce3181CecdE24dda8DddDB6a57828990d63",
    "userId": "214104220"
  }
}