{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8236d69f7e8ee2f42a5de756dfdb7c172f2653aafffeb783e4015e0a9810f703",
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    "signer": "0x61674481B2Fe9c307a8079B1db6a75d18CcE4e72",
    "userId": "550945137"
  }
}