{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x9f4eb77bc50779c2bdd0233b535501dbc96db72f3ce93e3a46f68ef29cda3542",
    "signature": "0xaab461d6c46cb6e01b365f840a4ec5fe7dd6b45b218bd962e1ee3bce8c9f40495ada1b73ad405a4a5092562ae930ca3488977588dd1645b665aa6822b25613751c",
    "signer": "0xBB3cbF4BFE93A8852DeBD3A264E281621575684B",
    "userId": "578447734"
  }
}