{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xfa6830d9a299dd0ab1fa5b21924ce51907b9e4c3c1eb3f6ff8853612642154a1",
    "signature": "0xccf44cba391f7f35a722ae11db931d56eac2a7f13c282a4ac1213031bdca82247ccc3b8cec54f5fbe3edfd03ddfc5d38b30e38845c98ab31b0fe84848e74c92c1c",
    "signer": "0x1Bd8D1F59efeea4aC492ccaD54406020AB908D80",
    "userId": "666512345"
  }
}