{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd775711a1fcf7f4567b47f76355aa20d1571a56385e179978915ecaaedde3afb",
    "signature": "0x33f58f1d7a6022e66bfe11ea05ce3db5a101a811d48660144815ae9e58bc2e583d20b86c5d134848e7e0479779297d505d9e31e58556c1f9585e320bd46c00d71c",
    "signer": "0x6cFb50fec469969fd657ebD18ECB066dC0c1bB0f",
    "userId": "241357530"
  }
}