{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "199337",
    "entityType": "User",
    "nonce": "0xa8c9c8360fa9f65239c82daf7ba34fcf65c8c7e3358b85e01823a89d8f509126",
    "signature": "0x3c0bae7a117a6561078d80aa30dae55e641da4a5a18af750d473eda748baf8175ba42771a8e52dbd4f550499acc729f7ab03c99a01c5314df8f455f24882aad71b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}