{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2df07a035e4393befa8f74f09cdc71d7933b09f2e053950143e0dfa070540a2e",
    "signature": "0x884ea56905c72d149a7a8146a51ad80984a4dad76229d909df6eb2d7003416497a9eb71b19f2a74310b7d51b83cd8ac2adbbebe9fc3cca84b92d60bb56c888ec1c",
    "signer": "0xebF123a3381552167d632a426876802d2d258D43",
    "userId": "739620943"
  }
}