{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4d0948ffbf9484615b011c195a31145b5828b2be442a53c0112b968afa9cb5d5",
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    "signer": "0xe91cA531AA10dbf5AeADf43B2e689863919e550E",
    "userId": "273714734"
  }
}