{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121201250",
    "entityType": "User",
    "nonce": "0xf9a5584a43421fc136ada40a21b6c4cf54a5bc9e05be2146926dd1366e057c0e",
    "signature": "0x3e4dfee59030de5b32dd41c18441863a1c2b961615b9e28767cd18fb9d477e79467a99af6fb20e4e35c21b26b6aff31611abc5bce31429e0043e47674bedf6341b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}