{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8d5567310cc706386d919d2ef5bd6eee1f8da706dceac9b5e8bef3a2cfa7ec88",
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    "signer": "0x80F75b4F31839103d97B92E50293B8579c90f82e",
    "userId": "165670909"
  }
}