{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb0ac64aa578f24630ad202975cdc51d9eea8f57bd5bc174bd11a8e1377d444df",
    "signature": "0xa36d35c186a386948fc21df5975319430c4a1d12fb6f91c654a0791460b614185b9ab07fb10b49ec7001f59da3c5d31296f9ed5137c8a8119f5c32613cdbf44b1c",
    "signer": "0xad430E05c9B02189c988498849C11CFC0626798A",
    "userId": "355821525"
  }
}