{
  "manageEntity": {
    "action": "Update",
    "entityId": "748754995",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x1bc84afb6f0e9a5e98b5f6d6ccf8c15a86209a50150f21bd14125f040b2ac3b1",
    "signature": "0x01bd3c209d19bd5ed8ac7fe6cdacb0fbcc2f423001eebc0cf551418e8f318a5e5ed96699ee4ef58b7fa7451617cfdbbfead9d554fa191c1387e8e884f5945f981b",
    "signer": "0xAC8b6ff37a7905Be129C642ca5D2ad5AB8a7FD0A",
    "userId": "748754995"
  }
}