{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "154589",
    "entityType": "User",
    "nonce": "0xb00e80d41acf851b1597e3f70f78a080089d114ae7b25d233545db0b5778208d",
    "signature": "0x31c42bd22c3d87ef8821049546bf964543ae0a1ebe6a662e8446347d648c0e500378912945b8cfdbf520325ac749100eee5350a5f33d9a575bfb11e360fabee21c",
    "signer": "0x4950A7c498b6c214e83B79502162b7f248f9e6ed",
    "userId": "499895630"
  }
}