{
  "manageEntity": {
    "action": "Update",
    "entityId": "771731069",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieraz2zekpefkl3yuwrw3e5wg27hshn5ilv3oxaqpvf3zevzvmwtbrta\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":723420661}]}}}",
    "nonce": "0x7c13bdbbb187ae4a99e62508bd007a686f1312306ac89465b616a799f2f7a4cd",
    "signature": "0x5779550a7ea38e19d5e59e989f4e77aba469c661aeee76cc201c65bdbfb7f4793d68c28a9a38335a23d3770393342a5fc552713db00b9a4a61bdedc8649222c61b",
    "signer": "0x8C2cD9474e966cA371f4245785f1F14a12031af5",
    "userId": "771731069"
  }
}