{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2dd3e7605a3faf0d3e53a2b3afa76c49cc4984f9f45b54c23501f753abf45663",
    "signature": "0x788906b3c4d056c1d2f81d78c43c2211eaade54c1e5ca99ead1b3d3158583c592230b95f9c86e67552814968fbced674b970397dc061cf1a3d2840a06cdd93411c",
    "signer": "0x0aB23E84C732c309265d2B19b0FA62C56c001eCA",
    "userId": "699518986"
  }
}