{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7e7014880ba3e2900a8493d53bf629bddacd29ce44bfc7e593e12cb336b05e45",
    "signature": "0x59e4b19ec097cc45ddd3efaf7c4d73d3d6cbe8be62a93b3c89168ad1cedfa1361f674d3cea93b48604ea716f4952c76766c1e8af932c81f70511cc5dff957a4a1b",
    "signer": "0x16d3EfE8AF349aBc9a3CeBDd1C9E93557f40Ed05",
    "userId": "824673445"
  }
}