{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "20",
    "entityType": "User",
    "nonce": "0x1ebb1b747ea09f50afd2ec9f6aad9a828638e997b1b385422af9fc874ef1a1de",
    "signature": "0x99330ded00b0cfdbe3e402365b2856fbfb0d97a7c1b4e4fff0bf4892b785c78f7e3bb0039e2520ff2e58593132bc2ec29bee51570fa57f774893734109a95fed1b",
    "signer": "0x7B499405130cFEFBBaec9980A9E37BBE42E8589D",
    "userId": "633494619"
  }
}