{
  "manageEntity": {
    "action": "Save",
    "entityId": "57773736",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xfff9ddd3dd82f862da618a1607d261ab9cc25fcdfe1ce431c145fc6d0c00391f",
    "signature": "0xfd29ed2481888711a575fe033114d10fe319176e19334d09215a98c9e5eb539e4350896843b32fad7c4043082b1abac85964af3748d5a9d3f427a060720f68ca1c",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}