{
  "manageEntity": {
    "action": "Update",
    "entityId": "553872362",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x89588cbf4d690612d7ef23fe03742f5a8c6691b3de1121e09c78ce1021acf0da",
    "signature": "0xc51351cc422cd48a15eef97ed3b0933da4117ae7752062f63f4dc94a1de5b8d077e20599f468a25928eb8806388ed783ec65e27336137ca83595289c921acae71c",
    "signer": "0x63E1B856BfA0Cfa2BA381C4F59838E153509C163",
    "userId": "553872362"
  }
}