{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "307",
    "entityType": "User",
    "nonce": "0x5c41b1d2314aeabb971451cf303f36d573227edc8a6a09b88bd175c0240cce28",
    "signature": "0xafa583b03af85a2f86cebcde3f2fa88eac4393549ec349a7b58b075372acfde4520bb3befa4d18c4776a8af415e7d4ad6af92ab5f68d46b407e42881a0528dbc1b",
    "signer": "0xcA2fC34A9E583F8E602b6FECA894286a1d17f1e2",
    "userId": "772779714"
  }
}