{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "13721",
    "entityType": "User",
    "nonce": "0x1c6a5184a7ebe6514efdb52102c5a5dea05a7c1d65ad86691b400a7b902b99ad",
    "signature": "0xa396adb5b0aa93ff46cd1a35dbfbf56d5451631fa906da9794c12484f51d5c2407867674753d5a83e9a32caed95abfd20717f96d8b442666f49ba51ec5c341bb1b",
    "signer": "0x40E8E224E8F8a9f835e4dc8851Da72DCEd75986F",
    "userId": "504092010"
  }
}