{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0xc66a7e44bb821ffbd3bb238414284f7ba72a9f5d11c4a96953027c5c200b53a9",
    "signature": "0x955cd4e45efdb4dca6c9b564ec8a85c67e8a06959758f775a768d9ab0176c3fa44b4aa8d88c8f6f869a19569f94ca0bbc38336a1866acccd54ba519ed6aba9641c",
    "signer": "0xb3f8c2e01Dec7eEC3871e15595d137a279951320",
    "userId": "975346777"
  }
}