{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "897648338",
    "entityType": "User",
    "nonce": "0x903faa2253361dd4ff32634a6df6dca2bb59e724067cac69c36360efd79e5054",
    "signature": "0x3316708e07c5c3a57f0667d9581cfb8b80e4d7456c3c522249b2a42e0633a9d50f5ee281e5e2d9446157573b4e8d3771932e1483a47e8225a7b70c09b241abb21c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}