{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "2500",
    "entityType": "User",
    "nonce": "0x1879db4ffa65ab9ef2ad13ad865c1c98f160cd2f25ac4070975badd00a516bba",
    "signature": "0xa354c62610d2d48275891dcb73ef8aac82756afd0970fd470a82cf59b3de68ec0f96afba1aa6b265916814139b3705ab6d861ac631859354a36e0cb79a4abdf61b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}