{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xcad7736fbccfddb63f0247a95d9d55e331440055259a933fee8bc480b15ec136",
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    "signer": "0x889BB74c17cd99f2f36F745FD25be89a32E568F9",
    "userId": "434987572"
  }
}