{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3c5d79394900b95e93bad8e481305c7a9cdd4129d929599abaae408e39fa9434",
    "signature": "0x0752391aa93efdfbc77a74dcf364ee8dfe6496c27b0a06abba255e0d5439bf5063d7e239c16a6b0f19f03459d238f61c1578954c98ff5c1cb7c681d1b64ebf0f1b",
    "signer": "0x9acF8CBE8f2B0d51e756C58D6d1f946A8757602F",
    "userId": "428941685"
  }
}