{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "504711810",
    "entityType": "User",
    "nonce": "0xa1d2b7493d98759f9a8469304094056f4b654436a5202e99e08c5e042eeb8ba8",
    "signature": "0xb3c82af6459368783c5e1e47470417c8d7e1a6d7db1a00efd8a37ca9003bb071203ec7651ba027207e4e0d3efd7b379726ab7ee1503adf958de5b722968a2b041b",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}