{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "385323",
    "entityType": "User",
    "nonce": "0xd53e589978afcb0e960b6fbcf1dbab388fb2cfa224be91f82b8829efe2dc8dcd",
    "signature": "0xea9406b40528d9dd57202d60509347bef89607139e8ad32f9ff1d80f2c1d17411d1411517edb52cdb29daac3eab177faa8f4e7418234b2d4dc2dc183bc8625e41b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}