{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "323508",
    "entityType": "User",
    "nonce": "0xbc037652d9babdd4487c3c2db2bc53b67d0d87cd411f61389890e41f99305a06",
    "signature": "0xd945115df22911b5d4cc292719481bc31ed626305571368baa05235a9aada5f245e4022ff4d069778a2f50f956559eee13df0878c378724b9f700a2345e8448f1c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}