{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "511519336",
    "entityType": "User",
    "nonce": "0x2c47ee6ef1fd5f8db461aeeb1c6d4cfa464e499a39dc0ae7d2c551923927d1c5",
    "signature": "0xb0eeacadf9ea09cfb5a07884fd759fcc8c89a8c5563694eb5fbf04983159a0cd65c3f8d30ed12b8a541efb6d2f6b0c9a6513aed52ca73e519a1e1472218da0a81c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}