{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa17ce255813d7f0a29b69b3305a131e9d4669c8de69a9308d836a24804d7a947",
    "signature": "0xf7e82002b290d0b8c1182f23253d5417bd36d04f431a8b594892c5503f5ba3406a548b300b220980bfb87b9a80261b266c1b37447fa51463a015b5d8c763ef591c",
    "signer": "0xaA6D44b912375bab6b82CF02498a163d7E6F13a1",
    "userId": "959969584"
  }
}