{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "606856748",
    "entityType": "User",
    "nonce": "0x64ddf13dce7048e1f09e1115fcddd01317a7ad29ff60b2a6017e297275e43235",
    "signature": "0x798391484de5cccca4fe21455c7af570047c7db5d51ac425eca5ee20b959778555c9222e7a5f7f8ea9c2ed1e0175e722e5fdd421398148be41ed4defc2dc38171c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}