{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x975c4444389f76d817de6a59633f05123cb458376c2cac21b9e7810b751b2df0",
    "signature": "0x8ce8d43943c23d3306986ae0f73c3cf9a7378a39b9057b14390c9ea6fe6ba828757bdc7da6e29bcf822615e39d4e92ad891f10e94db41e5fa733e35f35f0657b1c",
    "signer": "0xa8BEF74bDb7cdBA1D7E949228F5112f6af3276b9",
    "userId": "854828390"
  }
}