{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0b66bfbaebfd86a25885917fa4bee74480ada1af9489242c160fdaf80657c85a",
    "signature": "0x02568f4e53c96665f1ed27547a7030f4f2135cb245aef32db584fbf5b200897b6d72955f2de20711cd585c701a50a16907e41dc046b6263f5487fe05a96e3f5c1c",
    "signer": "0x802f183850238c97b952417908ac937c96BFB1a9",
    "userId": "74313884"
  }
}