{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508547804",
    "entityType": "User",
    "nonce": "0xda08e554e297cf1669e04e9658b06391eba0244c57940a15df1745c068f22612",
    "signature": "0x5da3eaed8a5b8ff4bcd2d2fff188688ec0d272f7b9e43a6750860d4871f5553949dc6a3e77fd354bdac2823f8a822d0536cecf79c95eb0898194ed0b312318c31c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}