{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "301637",
    "entityType": "User",
    "nonce": "0xf4d5797ba426d69f3f88413f3af7836a8c355cab781ae441d18b36956f7de17a",
    "signature": "0x43fd551728b1ae2f35434835d688e23af558cdb9e5a5afce95d1c5df8d8761e7443e646d59231d4f42799c1409097e1c54dc63de440564e6c33ff68938ed884c1c",
    "signer": "0xc6EF7347A7685FDbb9777415fEA9982299C0c8e0",
    "userId": "456631837"
  }
}