{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8241170de4daeb08003e2b533aa3d56101f41de48071fd75654184ba32d3e6ec",
    "signature": "0x86802539c40e0a6b7639bf9e8251cfb92013caee92982bb6df2a060fcd59cc9620e11e9e30b9ceaae6a24c3a264d989a2bf9a1a6649aa3c9c664d70fd56054421c",
    "signer": "0x2853B9af22e0F073F57ea6818F61Fe1995135054",
    "userId": "853261588"
  }
}