{
  "manageEntity": {
    "action": "Update",
    "entityId": "748581512",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xbaef8cfb3c416667b2bc32f9476daf1abf29adc5c1002b84959aae61e772d6f6",
    "signature": "0x39110bfe6c9e894823d25d5f1cfe3e84174ac253895d75d1ae6c18f3db30a7d34ef2d4b2fd3b13076a4665fafc70a792bbb08bc86dc316f07eaec73d7b46fc131b",
    "signer": "0x69F642f1FbaFC3710E919da223b90DC0D5eD7a1e",
    "userId": "748581512"
  }
}