{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x6311b6ce30acde872334d886b4c514be7c7fe9e79ce7b62a99eb0c70daa6579f",
    "signature": "0xc9ceeec2e9cb66bb5821f541fca2a410cd9a71f2f6b8d1299d5a29a06677b9aa41d5afb46077983f074319d2811dbf96d173b6d533b356a2706003114afeb6061c",
    "signer": "0x4b6B842af75cfAF1fb1Bd7B073C47b1001242a5C",
    "userId": "539898390"
  }
}