{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "672",
    "entityType": "User",
    "nonce": "0xd37a3f995c8fe3e87f859ab174409513a6c03353873236e4ddaa90d1ee446558",
    "signature": "0xac69c8a959d889576109bb197a217062189c6f44686c5c9c6148589d40b0617653aad5b53c5b81f946ee9ff82561305b246540490344023034652318f2a66d321c",
    "signer": "0x451d1Fcc610ac6c427d570E73Cb3641Acfa23b6b",
    "userId": "134623867"
  }
}