{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x8fdd3c07d3da07187e925b52e28f01f0cd30800ed2e2b5960750288b6a6f32cf",
    "signature": "0x368531e367c5f7306e5e36d81bb83dd4e35db03ed03d5bb472b96dd18bba41a21b909f949a6aadb81b18103d7b3dd4463b6add6e36260a8be6d6a038587c46e41c",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}