{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x34a607c6018bee05627837f5f103a0152bdd00cd882eda30662d295ced950730",
    "signature": "0xa9bea6e6a34307073c2e0524e0c1678e394f13e9853011e91f8759ec648ac5bb6ea5bc9778ff7f1d2c6e41981177612480adfd03599998f7820cc7e705db3f2b1c",
    "signer": "0x9BB87dC82C21490ecccBa3bEA242468C35b50082",
    "userId": "815721745"
  }
}