{
  "manageEntity": {
    "action": "Update",
    "entityId": "449203874",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0xf9f0e20b6176bc6037c6ac3cc3518dbe0e22a504a38d7bb26319df8782542f4f",
    "signature": "0x8c6b04cbe312579a391134ccf5637fe5cdeab4985b5811baf9408dc407e6deb4259e6a55dc8ec9573da48bf7de34e014d6214581795744d17dcb104d974302871b",
    "signer": "0xF146DAbBEa4a64091535c0e39A419D65150Fa66c",
    "userId": "449203874"
  }
}