{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "1235231",
    "entityType": "User",
    "nonce": "0x2883995a7e05fb0018112306f379f2688338645eee0c614b06a195d47ce8bf81",
    "signature": "0x34a8ae253fc7b95069a7b28d75afac03335f346bad65b496190ae3e31ffa03b81077fbc636265586017b4b32ffda7ed9abb663fb68d53e21c9bdb4ab97066a411c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}