{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x875e668ca9d185171dcccd07f153968bdeb8ec6aa514824925be0f6274bbb9f1",
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    "signer": "0xE7e6B236Bb4AF1D1a2Cae2B841eFCf1798b399d1",
    "userId": "854203718"
  }
}