{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x80737b159a661d1e7da111c2ceacc05b8249aa77a32cf6fc05609b4636986504",
    "signature": "0x61b3b1c14cac95740a0b832431bf86a9deeaef526d0dc5f28d839e14e3ea79b011121ed7e593fb2a58e7639461cbd37786c292416be78d580d56e7dc07ae7e911b",
    "signer": "0x96b669ee63c4887D3610De12B22682B4b08ADeEe",
    "userId": "129688171"
  }
}