{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb55a57b78cb0c4417a65e884e760ce6cbe09ab412c354623f260e548c8e6fb53",
    "signature": "0x29915297f6ee60d205e981ca818edc25aaa37e05308766a79e1ad3318ca8cafa17976b21efcde7daca20747824c54fa85821ff7e6c3e653815336b5745489b321c",
    "signer": "0x6CF29C21c9C0b405C773f3605658C095Af4c28EF",
    "userId": "950485788"
  }
}