{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "615703",
    "entityType": "User",
    "nonce": "0xb51e9915e7e0f9f4c3b6251023f9e7db43774a31651b7fcaced5b6140228759c",
    "signature": "0x587f521f7dcf00d940667d8eff6b65d1f79fb06f9e3261ac972b4dc4f8c950fd5aeb0158371ac4043b32543746962f5c73cf35e5aaacf237a1fcd209a43f98a21b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}