{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "343259028",
    "entityType": "User",
    "nonce": "0x7f6c51244365f027b5d8ae59934fc74199b1d9e0ad745aaf05d183a5e2e6c7ad",
    "signature": "0x4d5d6758bf0da636f0edacbd1e17cb9167ac86c043ac9d75268c38bf6c38867c53ce395e064966050b1233122f8cc55c0edce53ddc94edbb0662cf06ab10fbec1b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}