{
  "manageEntity": {
    "action": "Update",
    "entityId": "199997702",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x42f0a55b5045d12ae6759a2abeda94fc6b8a4841cab7b077987045a56aa63d37",
    "signature": "0x328cd17f76dcfa0f68f354b47a1acebbaae576f1ec4e4f266664ee94691db93b00f9f0a17518cfe2796ae7adb2fe1f547055d74a9339b58109ded5dcf98850341c",
    "signer": "0x12B5353A489D65A0791873da60bE5d8745F9e812",
    "userId": "199997702"
  }
}