{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x703cb99646e98f5ef837ca54b9d573eeb3cd83a615269458a05fbc4301a38607",
    "signature": "0xaa723489cd1d031e3b3ad02f488bf2b140d7e18233cce5021add905c2d34f29350ca8f3c2b257979657133b75331ee4c0391a2026b02c5bb368a603c0fe67c171b",
    "signer": "0xE7e8c0E26856500f9a7B3867f748D0c8b049B89d",
    "userId": "534084707"
  }
}