{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x1a8bb77d107a17400f687026bdb10bd6b155d6837e26a49ceb7ec4589adb2511",
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    "signer": "0x4a5fA5326FA8D8BA8c06F330B8e7AA7A2e63D3FB",
    "userId": "685706656"
  }
}