{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "524281542",
    "entityType": "User",
    "nonce": "0x81ecdba71e57e0445ce223f8ab1f8c7c1a56920ac2c38ca9b4294c3a3565de76",
    "signature": "0x4342913259b3cdb142864a395ca680d05b97e4d84316fd1f98eed07185053b8a4227b0bf3012c4a8992d26ff9af749ddc4e845bc0cf49bd966550ce90b8741bb1b",
    "signer": "0x204E506f1D5498d2CABD41d2fc7a3078d5792835",
    "userId": "768479471"
  }
}