{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x497aea1fcefd595bd151a190049624b94d1e6db5ef5557c5ea3024a2a047a2ae",
    "signature": "0x6dc17bc426f1efa5ed762854ae9fa2c7f7550b3045a061499fb1286a2eb2bc85547a06c17a21d9d2fa37f286f772f564933dd8ae12f363e2f0ad376ce2f51d1b1b",
    "signer": "0x1202c4113214dBeA1880204A73bad7c763b8cE8a",
    "userId": "97853881"
  }
}