{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb6ce43d078b226113c296231a86cf3527f9c8a0f3f78f4d37bbdf7c09ceea7ba",
    "signature": "0xb7fb758f2e4af21d1c70b9c70e0d325107017b7b2ac9db15e6d9e57fe23fdb2b0e07badfeb4239ea742808d83c7fd3be71b0e8b59a9f9311075afe0b9279efdc1c",
    "signer": "0x4280Beb252F5B6E28222D07E5fa4C7E2d276E283",
    "userId": "756677862"
  }
}