{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "688199",
    "entityType": "User",
    "nonce": "0xec0a807c3a7cdc779f377d2c2f9f3d5735d9447c5504bbabe9ae989179a17378",
    "signature": "0xda31f8191fc77cae8692c560fa1ca4f39f42d574caa0f5863fafa22e868e2ac40c47cf1950e2853b9b6991db001c132739172287cb15c280f2557a74054454281c",
    "signer": "0x646BEca96ab04bFb6DD725EEBc0383e1Ef13deeE",
    "userId": "588448440"
  }
}