{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "54988",
    "entityType": "User",
    "nonce": "0x7b92a4369dd10e1701294e7f443e6ce21f6e22b95562a80d0eebacce03524fe4",
    "signature": "0x557153d8e38d0448df3a7b7bf70e2919411a8863feea0050c44b6d3f8188431e6df4274d04de52bccfab0bd6b8d6980369b0c697a3351c32983f53aa47fc409a1c",
    "signer": "0xA3cEd4452Ec88415B96DE1F0BDfc3a358cE048b5",
    "userId": "387447420"
  }
}