{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x34b8183dc74f7a9c4d46e2d909e06f6c97879ebd42db04633cfb1fc6d6223782",
    "signature": "0x13f9a78e4121e601d230bde89a9404c74073f54525c3b64f3a2f4082ed1d714121c445b24421d75b530d994602befbd920271ab0b9f73c7fcc1542cc467c2d491b",
    "signer": "0x977F3f101C3c926E8bfE22f6bb935AeC1C93c3ac",
    "userId": "648747566"
  }
}