{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "670307808",
    "entityType": "User",
    "nonce": "0x90fc5dc6dbf70acd8b16bddbc7bf85989f2b4cf2cf2c820ede65ad6c502b05a0",
    "signature": "0x95350696895f5d9b6a38c29e36b21a379f192beed3049448999e7d22cddab8a061ca0e5b45ec7da9c2aa93c85e1e0f3c26043b9ade179728258b94af71feade21b",
    "signer": "0x2B28feb1CA15953a5a910C4E741698a24e8b3FE9",
    "userId": "887020893"
  }
}