{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xf3fef3d3a8c873a7c44502eed36e2a53e228aa2d6540d51611de94d8a7a494db",
    "signature": "0x203ea5ec9568b8fcdcf606ff6c8d270cebdb64728c1e4265451ccd71f779f8b31be09b402ca2932189d173acbefe4dc402a308e34ead06fc841ff14fd38f7d251b",
    "signer": "0x96e9FcB3bcf2B4B9B7347B5ba96A6a8813527DE8",
    "userId": "319177310"
  }
}