{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "356481",
    "entityType": "User",
    "nonce": "0xe23e64160dc5bcbf24ef52d7e598553a51b31833cf02d04ba912713f6fb7800e",
    "signature": "0xa75bef6db83acd415d0c407c027063b8cd47a6de53c9776fa2b429089c8e8c5c59a99945782b89f3e003ce7e5e756e662a46597d1de7b67ec489dc3aca6ae3ce1b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}