{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "540529323",
    "entityType": "User",
    "nonce": "0x8ab75ecd7da1bdb9f8ea5541823985e8f144d5725c8fdfe23704b4e344585af9",
    "signature": "0x886d0cb3a2b35c53ba8d674a839a1bccb2a6202e052964f0a37a222d526cc34c6ff2074a278d66b08e0748f25c661272f9598e1c7a9b8243590f2a55a513852e1c",
    "signer": "0xb001DCb64Bf57b3EcC76C4Fe5AbfE2a8B084D6ba",
    "userId": "641557420"
  }
}