{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x88f250d73ffda5b349491a992e65cbd8137a0c500a050764f91f2b76ca198d8d",
    "signature": "0x9583199f1bc99954ee2fcb1015436e67e783ab9598233a0d3449a27ec4309d256d59324f60762327e902cb837db7c771e52965fbd46cd14dbea9ad26026b741b1b",
    "signer": "0xf9Bf82B2ecB609ee37250F00C0835d529331385D",
    "userId": "654530894"
  }
}