{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x58becfa98c56745acb3c184536f12fadf292c2414f2c387e2cbfab202f000eab",
    "signature": "0x2cac8dc276acd62464f0c6b3f784b1b737f10c5fd96770e69f3a6583d323836c2f9522c48dd9413d493df24cfab5408d166228cf5e2a21d53057b13755d3072c1b",
    "signer": "0x027dee4FAcAE77245A6F18464aC5fBf055796333",
    "userId": "485711275"
  }
}