{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x835c76414737c4fab684eee5b878c4fc0446d198e1f5c63b8c49afaf1c45aee8",
    "signature": "0x94853b141837264fff9248bf1dad5cc2a175aba5c31494e13a2ba326acdfc2df01951e752260983a9dc280115e60cb36ae4abadcd2265c7abf333cc0cf8f6a531c",
    "signer": "0xfd7b89EdB6CF9d00f8D0934e76030556f2167494",
    "userId": "536358467"
  }
}