{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4483",
    "entityType": "User",
    "nonce": "0x4fc13c9f94b3408e0a9e30592c88ab0c845a69ad1e881a98ff01b68069948055",
    "signature": "0x7c448d64abd0693081a5549bcc32098b96ce469e489d22ddff6a8b92a1ff049268541dc4855870a1900446a34d06ee9e89338aa6275e0a45d0a48dade11907961b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}