{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8675faa059e1894f8d2d7f98635455801addbb0e09af40c9451c7a6ba2f1be5a",
    "signature": "0x0c24a8c4247543474eb0c12365c667bb13489e840bfbd9e75a16838dff0b16146796f1af5794ccde1f20a7591ad57cded959bdbd40201ba04e08c14dffd6eb741b",
    "signer": "0xfe766b536A94576f9505fA20c59ff92D8f72dAf3",
    "userId": "799013053"
  }
}