{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3603920b0bc25f5d0e11502d32fb0a4e255746f784eae7a6f23ad15a51920491",
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    "signer": "0x54843d003DCBeEC3EAA58af1cD2BFaf52E4d065e",
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  }
}