{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "251854",
    "entityType": "User",
    "nonce": "0x1b6758650af4a7dab8a4433c7cae489e750cde50b92bafda9cb94bd004e6530e",
    "signature": "0xa8185ea0def82f20399658f26fe18b0fdb611953c255394a4f1e0244c39930d2254e4e64280146c901944a693d795b260f25d357e9ad0dd2b4dfd05ca8c43cca1b",
    "signer": "0x408CbFDbc09C9aFB99Da5f010D04f50A190b83B6",
    "userId": "675830993"
  }
}