{
  "manageEntity": {
    "action": "Update",
    "entityId": "473911971",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x969594b2ba10b8dd25bae1d224abe99645e11de07b36106bcc13952d4a1a2014",
    "signature": "0x302c4bdbd523595603c5048bcc62e5dbf33770e404600f894e0c1c365bee3112725d55f46a369c144c34232b50ae46670658ab1b9d367d837e0548568483b39a1c",
    "signer": "0xfffF643204D053ae5bFC296Aa20F15313084C719",
    "userId": "473911971"
  }
}