{
  "manageEntity": {
    "action": "Update",
    "entityId": "563548587",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x626a6a201659a4fe6aa5d7651bd13346a1d472a1759c75707834059e296af72d",
    "signature": "0x54a06ca2bb4defda2bddbb192a82e30a878d9c2360bae9f2678de9bfeaeb37515a3b4902012c52825c1a4bfb38bd9fe1adbec8d52945538d91cf33e59efe5dc01c",
    "signer": "0xA20A7812eB057315eA5D463424Fb3532d425C454",
    "userId": "563548587"
  }
}