{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x31e3fec306534336a72245fdac0db85c93bdd2a8267926d24421ddd5eff46f5f",
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    "signer": "0xEbB1E4949194fc08d5017f3CBBc8755Eb442DC10",
    "userId": "517174176"
  }
}