{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x58821382035399e4a9a5cfcc2f2cc0fdb1c56c724af97d42944dff5747c5bbec",
    "signature": "0x5009309b0d5050ba9c250b3d8a812db8ea9c50ab0e22a870e731696b70da29e738779c675cd50b6fd5be7a19d25e229acaf47038e680f76acc08fca2c3e0a2bc1c",
    "signer": "0x7597c344f2cA84759691973cED6234c95796DEf5",
    "userId": "548675890"
  }
}