{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307576",
    "entityType": "User",
    "nonce": "0xa291f974e698bff270a620475b806be5917e7f4e7dcab81adad6cc741bf213e4",
    "signature": "0x405234e8472afb08d84fa3aa10efbdfdf40cfe8e9cb132ddd5a2bd55cbe64d1c57d5316f915ad0de43d73cb6cb2ca5616ea8150d16bf3dfa76792f8e145892db1b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}