{
  "manageEntity": {
    "action": "Update",
    "entityId": "508153670",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xb0405211305d9519a1bd3f051c9b096a69dadd45e11562ae82ed20cf74e8163b",
    "signature": "0xb149586c5e588203e8a1c71722f1cd7a9fb58cd68a98795e4da98b112068494d4be28d383165a0cf5f6a84934635db0ea33ec2527c667ca08f553d3fbb17859f1c",
    "signer": "0x877D195E0F5Df3506016fBb0fb1b1E26e65B203D",
    "userId": "508153670"
  }
}