{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "921512454",
    "entityType": "User",
    "nonce": "0xdff18bebc625818de34d2e9804ad189eab8b010fee8b48428d4e8e3ed0e9c432",
    "signature": "0x76b1820206b9b6047be4bdb0dc409e013472ef4feae56458d6d4254ea826161f43e3bc0f9053db8ba3754bee4a07ae9c0420fa624399428af6d05bac4ace08171c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}