{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "338745876",
    "entityType": "User",
    "nonce": "0xc7cb1f71596e1ab8fa5af25746e4ef2b4bbffc1192ab866003f537ae624b60fa",
    "signature": "0x7c766cdcc59be4efeb798ce7210171f29dff9c3133c6eb35129cde43d2ce23ae3e7eae5515aff953dc7d98358038ae951f82c54e495bc55238f4a74b8b81ec6f1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}