{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xeae92f413a2d7e2357d86cf73e56bebc959a21c6d735a2a8220d92122feb52da",
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    "signer": "0xa44b585BFd979DaB4a62f7fe5E931e096A7dac76",
    "userId": "656997360"
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}