{
  "manageEntity": {
    "action": "Update",
    "entityId": "573970504",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x6aafed114127f302135892cab6fde18b22da2630a50ba3cdab0e6d93cb21526c",
    "signature": "0x18f67b506e1b83fefeb3221cad85918841c858dfe3db38b492d9296e1acd0075146f3278349207bb41f71cacca79b64212c4b014c5ade591a5684f7e9fd01da11c",
    "signer": "0x28401c99C535433c5B21987f5659B1b914550691",
    "userId": "573970504"
  }
}