{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xf7f64ef3264e998f0c265942d96152be626b5eb6d054e5f1234a12948f9cdc44",
    "signature": "0xb962d10a2edddad8ff3ccd091b06d5cebaa6864c0afb690b9a22da64219db32063f154271e43eea0bf0b20f5fc2cf3504eec749a200f57542784bdab69e684551b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}