{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "200080308",
    "entityType": "User",
    "nonce": "0x8f70ac4782109added292f96b0a4b5ef1b6c1f2d2491ae6e4b66baa51ff19373",
    "signature": "0x78b885e2f0459fb8544d2dc8a8314aaa78e3c001be8b4b1c128a133d589e5b28081ebacc3dd27de38cd448a45e9d331b90a76c7a9e7ff346247485448c60c2c21c",
    "signer": "0x223D5f51f92558c8Ff07CEe4Fd5478570Ea071cc",
    "userId": "486317678"
  }
}