{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "64501",
    "entityType": "User",
    "nonce": "0x3777746fdf778186e97fb143fa6a6647ad9364ca57faf2377453bd37f1eee607",
    "signature": "0x2606bea29537c4cb4328c64b2c0c96816b412f9edc6e9d4fe6df0ef3e5065b321fa1fcd7336293ccf6c976b5dee49a7c58a6e9afba4431f798abac7ef360be331c",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}