{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6a3b0c2f13e3daa7734a6eafc8e7fbebe17f19114a39f5a3ea25f62973bcf8a9",
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    "signer": "0xd83DA233a4f93E91458C2b468E7BB86f284AC606",
    "userId": "523247117"
  }
}