{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "641172",
    "entityType": "User",
    "nonce": "0x92de2cc6df073976e885c7e490ac283a11d3aee6a62da9ede1a532838538eb20",
    "signature": "0xa150dd58b9b91062509e5d9745d6062c828d182a2d6563a19e4ee73fa0411bc409c8d5d807e4b9f2035dd68690144bb5d6cf70234e8d6c9190579ee3bfe6af351c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}