{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xa6d64fda95475d64e35bed38c5734de8583e26ecdbe9358cc83249381136430d",
    "signature": "0xb4652c08b956e09709b94e8a05dd87c0463bfefa3b468f6ace07bce19990029b628e1f40e316210887a6c6d027ef2aac6cfdd73200d92e87f07cc799cbe587071c",
    "signer": "0x5F2a7F099A16064bB150f4eF76B8B5A60DBf18dB",
    "userId": "321060201"
  }
}