{
  "manageEntity": {
    "action": "Update",
    "entityId": "450598201",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaiera7f3gxhuaosrqciviaq64og6eyoefg5dtck6bc4vofjh4ddvvpyza\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281}]}}}",
    "nonce": "0x83e926871d36f1b0c3f54c081fab7282d6557bd2cacad007c7b6153359f4e665",
    "signature": "0x37832e7972344f699bdc793023560967d9292c5d358c14fb033b48154f48d2fe63a785493ac191ad9abc23076db992d55be21d1dd4935dcb02f05ec5e00d73411c",
    "signer": "0x5c3A14eAd942d7299d7814f8FF5A846934B13463",
    "userId": "450598201"
  }
}