{
  "manageEntity": {
    "action": "Update",
    "entityId": "354951137",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x4ef291f4c85a4d8c171c9a6809a0f63a671637012b20fe837ca8d2d70fa9fde9",
    "signature": "0xf88b715640dd6d4b9840fb7a7e089aabae3709deb6ca51097d4a5e207c8bd8d900945df347722055ffc228565184965bb44c1911aa262be1ebbe2e24c2200e6f1c",
    "signer": "0xdf5D006aE5C17a1EeBd08e6A3634A1779D76B91a",
    "userId": "354951137"
  }
}