{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x25390fd97a221ba9d7dd65315ae2dffc730623628ad5178f451e5aeda416ee70",
    "signature": "0xc1603fa23464d12109b563773c833baad7b43a0c3015f2216982dc5226928f121c4525b191571dfaa052de72554da7ce331a1539ca1afcfd15766419a89911e61c",
    "signer": "0x407d98945f6A21AD4BF7108Ce0DDA86617037967",
    "userId": "287065927"
  }
}