{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3eef51bef6620d11234319b5e9d9004dbc1d145cc330684fc04dd24e1885a231",
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    "signer": "0x7b714649d2FBFc39067d9015049a46f1bf41Ad65",
    "userId": "700707561"
  }
}