{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "198242727",
    "entityType": "User",
    "nonce": "0x8f93c2dee3b499766fdcc21595a39fbfa572e08c6a321bf7e31966bdcd2d8803",
    "signature": "0x616380687960d9a5aa6d45be70b895c6dbe2123a93f3c76e8300b1b2df01ba9c46f8238ad6f027dcd7e556c38871e7c95946e7ad498ea08ed0c83a02342af8fe1c",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}