{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xbbfa991f26366b76dafc6f487e7cc1609e36b5220ba9a821ba2007312db7f73f",
    "signature": "0x3173315fab7da3ae81e91b47199e37d2a102f9d28fd3f08cc5fc211cbe87057e04dd383ba26fdf906bdce71f12c2b0f5166fb73480aa27291a7f173550da04111c",
    "signer": "0x19edBDeEc1E820D9FcA45532B464fAf686bAE208",
    "userId": "156293346"
  }
}