{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x6c7837005c770a43ce11f8337df2975443178bb2e4f9621f8e23b536b5c3004a",
    "signature": "0x443d7677310c2bd49b1ccc34c9bcfc44667c96766504bed1ca850b8c05d59ff8061b0848f5e52bc2814ddd7b28075ea0bff3a94110a2c17f8a65ec0ee8aba6b61c",
    "signer": "0x056b39c7b398b7329E491637E50f88Ed33525F2f",
    "userId": "320054654"
  }
}