{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1510921",
    "entityType": "User",
    "nonce": "0x67e5d0e9d217b73c83eafe344ec984914c7e3afaf612c409002bd6879f2e61af",
    "signature": "0x5d814788c1bd5cde30a0200f0fbaf81aadae6940ae767581e4aa629d240ce459142832a9eae19ea39b199c199617aabc327528a70b4197dc9eead67f5c3f55e91c",
    "signer": "0x793bbEFbb3Cf1e6529B90296e502145aCcCDE8d6",
    "userId": "838777725"
  }
}