{
  "manageEntity": {
    "action": "Update",
    "entityId": "57299423",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf3cbaa3889234dc955a1889cf2af4481af8a7b7b3e6f3a7cadacf3ce1d90b6de",
    "signature": "0x75be696ed8c874b77431a90987f4b02e112b4951867edf1667f43b09ff724bce45d9be4b1e8c900c8706d849ad967209d3f9b8254637c2abc74c7be4dab7908e1c",
    "signer": "0x789F486f6C0BEcF3D1E3B3D82c61D526Fc7Edca6",
    "userId": "57299423"
  }
}