{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "821468173",
    "entityType": "User",
    "nonce": "0xdb1bc1d360e5671f199c3da429504cf5c825f5c964dab7fb06954709d837d9d8",
    "signature": "0x7b4e9af0654747fa8074573f84657cb23d31f8af49d86a4663d3daa439a2de5079f266df9428441d05876b6f63ec5ad25f348f21105c44abec06d6fd77634a731b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}