{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3907a99453b7f883592492b7e3357fc76e90fd1e51f04b7a131cbadf2b31a2a9",
    "signature": "0xf24c0a59d10f3fbd8cda02a12bd40dbbaf953a12fd89ea34941015f6554fb6d61835ac2e97e4c107c00369617d4b0300b1afd73c45a305adf696efc0cc3c24cb1c",
    "signer": "0xFa074f848Ca977aCBc270CBbfd4c375c210eB1cA",
    "userId": "939103135"
  }
}