{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2e3a737c2e41f5d037594f515cfe82fad6552e2e880e5f44409ef9eb241f33af",
    "signature": "0xaa8c553b149bf7a6bb78bab7b931f7d639e258d6dc664808a3360a85cffef989212d13e8186814d5ea4a3cbd565c2e497a922dcc549e1593cac18dbfd086fc481c",
    "signer": "0x6ae0a1f023b73E850eE299ac57e547c85793081F",
    "userId": "994837043"
  }
}