{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3d42daa312edf8cc490059241f022878037591825de99136ee49027f7e9720fe",
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    "signer": "0x5B68F7F5f771Cb17Ff515109D1eFbcA2bE16Dd52",
    "userId": "598390311"
  }
}