{
  "manageEntity": {
    "action": "Update",
    "entityId": "512398030",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x37303fa29e9391f10c9c245cbfd87a1ff5c1be8d47335c7c6229cf2b6474c420",
    "signature": "0xcb83e6db7b1847188e914962c90fd62c997f8ee87a3232c5882ca4284547ca1c7d5529cfb5fe999b3b597e30ede4f06edaeb256fa9d756f4684a18bb010463961b",
    "signer": "0x9717Cec0d26c8A36Da08D838f174B2f2d462CBdd",
    "userId": "512398030"
  }
}