{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd603ee06fc9cd2bd297d13d5a9936b764bf35dea3f169ebb63262e2d28d49473",
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    "signer": "0x1879513acaaeE1B0980750886f962A71E9f74e05",
    "userId": "915757474"
  }
}