{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4838abf56ead72cf59466fd5f667dcf4b24e477b37e21bca483b54f609ffc2b6",
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    "signer": "0x2953e9A534a8d812306f2A98E00713a645Ba3815",
    "userId": "317406893"
  }
}