{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd928301cc6a3127212836cf8100245bf6621c1891c3d513946c2f65fc645ad8d",
    "signature": "0x8a6520d27b419315fb252539b90f59951a4dcfbd976fea82461af0697ffd8d696071e07334e0d2b5f3eff60788c31800d2e2da03e8c0dc3add0c921b5dcf15911c",
    "signer": "0x13e1405dfe19eF3f8336054191Ca99fc367FA9AA",
    "userId": "587339436"
  }
}