{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "759473",
    "entityType": "User",
    "nonce": "0x81934fd02949ce4e6d27b5ba0464dadc81ddbea98d1cd13096d177ea5472c8ee",
    "signature": "0x8a6f8dcf6a5fa80935fbb9ef619da9ab1322a173832899f018a4a4c3105c6f4309623bdb24f31fbf069190c3d66600b5bf144a4cadb46347f3a8c40a01d380611b",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}