{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x1209f2bfca9b916bced7cec13f62509f8199de7592cb927de9fac084716c7f1c",
    "signature": "0x6c389ce6c8a7547486283f09e4ac5be69f49f081b46594bce96ea549689d6387029894002b2c3e26f8cb23a7c527796b33d4ba4d9af5b325ea011bb9d3c9baa31b",
    "signer": "0xC0dDeafa7a89C5C1D93A26D3A12a7d1978A866C5",
    "userId": "729568521"
  }
}