{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990579",
    "entityType": "User",
    "nonce": "0xc4507b85c69b815ceafd3042a1546d9452ea4fa4e4f74f5f7afeb1368d90ce4d",
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    "signer": "0xE7A4a8f1d081B44C96Ed68610B6c3016ce8cD6E0",
    "userId": "464427506"
  }
}