{
  "manageEntity": {
    "action": "Update",
    "entityId": "323879851",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7brzclok5xa7jdqgyouxm5lfmlsmmlqylm7lzy4o53f2274zngkq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":320679866},{\"type\":\"playlist\",\"playlist_id\":55347773},{\"type\":\"playlist\",\"playlist_id\":1619182178}]}}}",
    "nonce": "0x69823ecd1d2f24cd9c7cb72cc7352a6ffcfe700b71d0c486a26279046bd0c904",
    "signature": "0x04726325d7f7aa74d58447e9b32e1d6050dd9d0f89adadb0aa5a3f3cc6f350551c84e5e3e21441f2fdeda48eb0de1c403ed0516bdac5992424e953e1eda4cfe31b",
    "signer": "0x12aD0F6A7Bf3ef1Fb0FFE6e1eF9E50BCa3149Af5",
    "userId": "323879851"
  }
}