{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x73ecad6a80c3d3cdd3f25db2e49a871079805c900d884693ff465cd7d0fd44bd",
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    "signer": "0x529d298fcA9C8cd0aAb86E13daf70CD4d26f2840",
    "userId": "742845649"
  }
}