{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "121458",
    "entityType": "User",
    "nonce": "0x5a8a57f63279193306264d54fd339033abb7994ec93f47c32d8c00f41262c74e",
    "signature": "0xce8b37d8fb2391e0822852021a54ee8b150d516fc2f9738a70969081efa10a2a17cebfb0fc00fdcd9c5d497e101252508ebe8d5e7921b86e4eb9dec71d56723c1b",
    "signer": "0xc88bd025b5DC52Cde584b07899B6E5C854Af4bC0",
    "userId": "781543844"
  }
}