{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xbb75dd7620f2d91dbfee73974ee176b63cdc28c512ead7dd4b8163910b839c84",
    "signature": "0x870e9ee697ef3b99081ab11af1f97324de0696df1c4a06fbb9b9d4efa9995e3547a8366b36f11bf7da2c6da99db59b221489a5c836e85ce14e04fc3a8f6019581c",
    "signer": "0x7c9023569D0688566422657303CC9788011C2a7d",
    "userId": "621534741"
  }
}