{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x64f71640e7f9ae7a7f8a0622391824241d5b287ba50ce0dbd712e191250a3d4f",
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    "signer": "0xDcFc9AFDD8FB09fa32d0c5b309c7c0E72Bd8F868",
    "userId": "395235305"
  }
}