{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x11d40778b58b127d8601d3c40db7c24f853c1f8434b9d004607dbfa61abbbd84",
    "signature": "0x91ac12e88582eb353fe477d9710a4e2837e57dd39eb358c5b39fe284009925fb549471efa79e2b28bd9a190ea575c610cb4360841488cc2cb0b19f27fde50df21b",
    "signer": "0x400C9A366Eff098F2ddA26E9da912FC9E092284b",
    "userId": "151067581"
  }
}