{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x148b97e07bb6a499244b3dd3674e1abcb251ca859a9803873c5b60681b9fefc6",
    "signature": "0x4fa0fe3dee435b579bc32d38daf9000702cd8098ba8beb997e49d7c77a10a5bd2e764ea13ac98ee9f148ff1cb16464f49cac13ae020c67d48e08f438e266036e1b",
    "signer": "0x399726fd5A103a5f9026e1Cfe43Fb38073AE3A3d",
    "userId": "193799807"
  }
}