{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7dea395bb3087a8060db2b9c9ccb4c3bfcdc63d1e881e22d9b3a893adc6f4fff",
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    "signer": "0x002003A2C193cf1E880301Ca10e5295f20f6A48a",
    "userId": "732019006"
  }
}