{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xec47407ed8057f9d241ef91ad8ac99ce1ac841939cd6841eb804ae997c44b6bb",
    "signature": "0x34fea253cc5392004b7642fe3a2d76443cdbe4f6c32fa3de380e51d469e5129b1da423b144526ed3de9fa7c7a46283c13d60312210483734e9a811f0cbba69ea1b",
    "signer": "0x69163Aed5B32EC7f6C8a1e4aDEd7fD7E298F9521",
    "userId": "508931608"
  }
}