{
  "manageEntity": {
    "action": "Update",
    "entityId": "621774029",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x6177643b85edfa1e63850d34679a63cf35fc9cc6435d7de19c6b9c58f72f89a8",
    "signature": "0xe15d70e0836cd98d5f6a6caae6fc825e68364df2d82420f0b7e1bcad3002bd0739f3a8bbe743588770d55b3f4deaad46bec5a73338217b55c7c996b69f713cb01b",
    "signer": "0xC8E98439cD764aDe3cff6B018a4Dce2806a3a464",
    "userId": "621774029"
  }
}