{
  "manageEntity": {
    "action": "Update",
    "entityId": "512734349",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x1b312cdf085150158415455df7ad1a1a519c0fdd0cc91a4f4b55f77fe0165b75",
    "signature": "0x70c8fe7bb8b5115e05f719b16b3a84980594d5ad61402a4b7614f87c71eb51fa1890a09a806c4d8855d6cfe1f5756c2b63257634fc6afaee14f3fa154bffa2041b",
    "signer": "0x4Ff77Da6D5C7286ea15F7F94FdCC04a641dE9a27",
    "userId": "512734349"
  }
}