{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "3407",
    "entityType": "User",
    "nonce": "0x401771a1693543ed362174d55a2ece291051a2c54349b37e8fbc1aabcb75fc97",
    "signature": "0xbde8e06b8ec4684206f909968a35cf76c3fcad9291aa38083b967395958e36bc454ad3e2a4df077a98cc79b1189ff27565082612976391c778a3cf56ad647dd51b",
    "signer": "0xf76Be3e57D30ebb176cA7D31f49157c7f56E6b0D",
    "userId": "204302128"
  }
}