{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x2240c761df2311e5e8d87e336f93a59c326aeb5c698aaae909ec10e654c0e76e",
    "signature": "0x66a350ab936e2e5c701b66835d206afdd0be6029fed8f21b30ce58ee955fe7c568c2eb86d96af5b80727b3d3ea22fe4257a99578b66a87207e17a874f00b12cc1b",
    "signer": "0x3dCA4F786a1e64C4c6ea46dbB67Aa793bA7Db05D",
    "userId": "19387738"
  }
}