{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2630553c8171994058e470680d07aea965fb774549837e8a22775c4074c995fb",
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    "signer": "0xe88721130a8800cc60586b20Ffcfda735c9Af2d3",
    "userId": "14676539"
  }
}