{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x971aa884589459540247c22fc19c2d96c1d06b8911eb03d0090ea90369c86cc7",
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    "signer": "0xa361a0514021Ef38D01F247402b0757B5213cc18",
    "userId": "455351007"
  }
}