{
  "manageEntity": {
    "action": "Update",
    "entityId": "5500",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xad58e571e484f20ab04d59efc951f68e8a315edf9144d12928d35133aba23dc7",
    "signature": "0xb97424a54dac586c62f2f4a96955b8cb23e140d0f60a7e391e7bab725c023870167406ae8db46e0bd8f454b8ca18b71cf3abb5203fd867fce48cf35bc965740c1b",
    "signer": "0xDC9FB11483106d427BaC29ff4bf0E03f11b4e19E",
    "userId": "5500"
  }
}