{
  "manageEntity": {
    "action": "Save",
    "entityId": "1212958300",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9eeedb96f85cfc1447eb66b3a34501fc05933fad3cc6a60088a4bd8ed3660a32",
    "signature": "0xc1dec0cebcee299afec7f225e71e451302a5493b42bea4bf145f4d5099245c7e69e9b7543c2b5e8af23e2fa9acf439d9e6f4a5d8bd767ce3c24955ecdf2e70331b",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}