{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x975ba97e426745fa7d32a0e460b3b89949716cffb1c3eb3eaeee236b3f25ae8f",
    "signature": "0x3516d304930dd85e27f442b6e783d3f121bdb5efb48c9c3a65effc7cad650e03648e1382fd24261125b6708e4154d47698e8cf1c74b1dce85d01536458af8acb1b",
    "signer": "0x45431d52A374aA9d0891f2Bcb6961aE10227f64B",
    "userId": "318391232"
  }
}