{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x62eb8a6603ca3c9b0ea9bac28e402133baceda340564b2977a68d27d072ecc90",
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    "signer": "0x54B31a83E626e21EcAec175884EEca5C623683d9",
    "userId": "693139787"
  }
}