{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x7b3cef998ec68dce66603f12b394964d6ec31dabbc9e413529edc517108065ab",
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    "signer": "0xeeC56336C95A2E36D264202a086c2920788E023e",
    "userId": "644127200"
  }
}