{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x7214b6930ed7336bde2b389b9acf941b64ba36f2bf504c014a75aa4459b307d0",
    "signature": "0xa13f86754991bcf657a2ab1a55644364e71f3d5b8359ae9a1b89191fd8accc3707603e62d62ddf56279e5ccc3ef72cde289bfdf22588f984a9f988fd6846e5ec1b",
    "signer": "0xc37Db8e6e1bb31Ed73525e15E3481c10d6ED4028",
    "userId": "577494597"
  }
}