{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbd706ab3ae374ce7cfdf7a1819b5badcf9cebdd1d5057f9849a1c447d3044c4b",
    "signature": "0x60ee0f8315a8d1540803d716c99af916d6be034bf88d4a29595e54a6637cfaf36f70ce96b13c98f4f3cfea0ca6bf4fabf910938f076a15e25be50408a46a6d6b1c",
    "signer": "0x07e5753264E3b7F0c0ba1452D6a786dbd1Ea9FCD",
    "userId": "239876585"
  }
}