{
  "manageEntity": {
    "action": "Update",
    "entityId": "478820287",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x92f05e60bf15a25982e810be40aa9de0c3083cb835d9858574d74e4cd0db58d4",
    "signature": "0xb0f8a743275da89d1f6970c463a1ec0f599a903fc506f2e99e1eaf12b016f79a0aca6ce65bd16b27452d3cdaa0d55e15e12f3786948852427705a3c84772f9471c",
    "signer": "0xFBEf70FeDeEF5e9cA0CD581ED29cF04Bcf91BBF2",
    "userId": "478820287"
  }
}