{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x099dc0f15ef49088e150118550c4081fe5bcaff2c6f7c3e85b284f1f85c967ad",
    "signature": "0x03f4fb35150fd1694ed8c7f0d9c02fb57fbc741afe4d0b90ca82e37eb4c344bc001cef1720393c1e6ff03329d596a0f6b2070587934f75875182abfb40ace3421c",
    "signer": "0x0AEe89b3815a269bE3F1D40d0538c87D9EF3008b",
    "userId": "258079208"
  }
}