{
  "manageEntity": {
    "action": "Save",
    "entityId": "57624",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x57a0a4bcf21aacbe35fcf0e057438c800df254bff95e20f9b3fc2e98a6ed1559",
    "signature": "0x7589eebac74898a62be49df6f39b9499ae8506c02ff3858200079ec9068513be77efd4d7abcd7f774f0df5955cd4e769dd7b9ad8cfc03f274d112d31566e6d581c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}