{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbf472d2bfa7ee537ae0cdc16fb09f379c643e1f88349fa74ee9454cc1e992a7d",
    "signature": "0xdb075e168f440e159ee47b42c95b8b6b262965209803cf92abd82252ffe5bac71254a28f8db3c097ffcf63dafb2f97e98b7e34a612a12c208ad4aaf3fa5740721c",
    "signer": "0xB02c00216F9470d4e900860B7432a67E08f9c2b0",
    "userId": "931626376"
  }
}