{
  "manageEntity": {
    "action": "Update",
    "entityId": "971129804",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierapg35hgchxw75jkxn3x35owkxo6t72o62ji36asspb5u4pxc4okza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":940553898},{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1972733550},{\"type\":\"playlist\",\"playlist_id\":787876336}]}}}",
    "nonce": "0x35e8b8c65c45ccf75dc9083918836042e95011806a22d01ea2ccf857e46d80d7",
    "signature": "0x51bebd04cc73ef71e1123b01e0a071073eec3146b8f0eebe54ad15ebaf58a42f595c144d1637051a8b76bf7eae14af1ff721f707178e76145f1142095cfd82f01b",
    "signer": "0x3e48DC5763519fbdE0A26db7C59929E8Bb6B8Fe2",
    "userId": "971129804"
  }
}