{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "643532828",
    "entityType": "User",
    "nonce": "0xa01b4049d65a7e6a11b8e51f707c7423b5939ac7083afb49b8d090954670cd3e",
    "signature": "0x3cd77fa0888bd485931ec45a00e758d2d5f218934e6e5ff1814a894e3f4947f821ba8c33df2748b881647dbeaa285c61d26ff9eec36d700719ae46012318b9871c",
    "signer": "0x11cd379D12F9a2c7BAaE2f74F1914A8c50faF2c3",
    "userId": "387949683"
  }
}