{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xb1bebe0e0600741a720420aa0602a41e0d45ae701ca138df5262297476cccff2",
    "signature": "0x850a7e80eb2fbf59a3e27fc41ac41dbeb3d768bdf92a7a5f93f76c2661b2a742386e53566af3d1e5f9e09722e61c5a52a41c4ed1e60584e65c45ca02fe433a681c",
    "signer": "0x67aFdccCCd0147Cb231e9B02eEC575Bbf69D3ec2",
    "userId": "994592146"
  }
}