{
  "manageEntity": {
    "action": "Update",
    "entityId": "146147487",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierawrkihzamj6il6flupdhtbms35isrunjvcewstiyawbwq5mcrle5q\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":555008000},{\"type\":\"playlist\",\"playlist_id\":896542634},{\"type\":\"playlist\",\"playlist_id\":1708829366}]}}}",
    "nonce": "0xe6280843c2be7aea5f26d78125a280500c3c64458d05333aa636493f0064f040",
    "signature": "0x44994601da5603faa7f6c7a4c536385ded3921eebb0548db5bf7588a272cb63811679ba89156b8db86f3f5dd30cc8b493b0cf23ce5856234b13bbbfc5b00eb751c",
    "signer": "0x4964108b840Fa39C00999Af5e1B66E0455e04Cb2",
    "userId": "146147487"
  }
}