{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8f0d53bf817f122808ae14da4f03187fb017d40fbda7aab4206c8e01879d4347",
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    "signer": "0xc4f43cd53a0AB8479f49926948a960420F0286bE",
    "userId": "535039192"
  }
}