{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x68c2822d675ab8934cdbc958e691ef6aab3d133b7b7f211c1640d38e1dd27ef7",
    "signature": "0xd28302e4f079f5f33c973b7d5562046a82db350ed6c2d81f06ba98e5388869590aa844c20b1f3dad4238012b2c3470ef27765f6679429317c4d7bee5dbf8d32d1b",
    "signer": "0x1b2b5973B096C8C3E93BfD5F769cf27295463638",
    "userId": "709797587"
  }
}