{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x562bffbe420824e0e455deb5e765407c5e03b012e4c5a5f9e9e2789d66aed019",
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    "signer": "0x1934b9F2b24673B8B682058E6B2EA368152a03DE",
    "userId": "990570778"
  }
}