{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "519637214",
    "entityType": "User",
    "nonce": "0xd3bd5489f5fa45987ebd2cdc7968b787373a87c986e65d4186286854acedc49b",
    "signature": "0xb0e9bd3673692d0198a21f367f38d08d6990e9bdac5214f5c4c901e66d12291a4e043a33e1d7244bb44729dc6c66f617c381c64ea12de263f54ba360e2b15abc1c",
    "signer": "0x3256Bd2D0B1984E7df4FA525017aD9bA48470760",
    "userId": "51"
  }
}