{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x20d0425b9fd00ef037ca264e987da27b8e21586123ad2d6181794e433e8acd1b",
    "signature": "0xb8cd418fc4740b81e612a40b2a51e35bff99ce2cdeefbb1fa704499d0812c31d2dfa7ce83030dba8d0d1bdbc18184f7d2d0eca9429e6ab4a6072c9b21fc70f891b",
    "signer": "0x582624A637044A765770A1401561DDFE7a927459",
    "userId": "840700709"
  }
}