{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "854498636",
    "entityType": "User",
    "nonce": "0xe18794527e2530ba168f9c7e25088c15dc3be777c5ab2a7d5f7eebac211ca288",
    "signature": "0x8f3deb75f5765a50c06f22516ed24b331bb81a2ba93c2d2701f50522af90f60d75af021b33a9d92e97f96fe5c0a4f96b1da6a42ca53d8b5a32e7662ca76fc5061c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}