{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "508186998",
    "entityType": "User",
    "nonce": "0xb5eb403d26c5a6ff8fb2350de2ef56f858a24c81bcb7145d5996f11d25234586",
    "signature": "0x71a09c0fbe1dad32c7c803d157cb4afc14e95b459981f638978d36ccc77811ed7d266c1ebb3316d2761ffe61d978b1c9bbc22bd639051a5918913712d9afb1131c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}