{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "708",
    "entityType": "User",
    "nonce": "0xc8c75b5e7af9a3f3f7c971fcec5219b9590ad0d1f5951fa4c0c78e6cb17beedf",
    "signature": "0xe6f8d653a298012b5dd6f92445345d1d31195d4767478f4d824a9992ff5d02e8279ef9bf93b17a09f6ba76f754660b8beda0a1ce9c10adf0d49e255100593a2f1b",
    "signer": "0x57Ad6E2E3fFc5ABe9b5FE7DC3bF7c07c8cCf9Ccf",
    "userId": "571702334"
  }
}