{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "512214950",
    "entityType": "User",
    "nonce": "0xef1b977be341bd29d0da8821cd2b3cb4b39524c1a1ee792cb23ecfc92d59e0b4",
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    "signer": "0xC35123bF05ca0B3A7B333c53E47bcd9f9DA864d4",
    "userId": "33896318"
  }
}