{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5ccba1ef6e7b927082c16a4198caeb942ed13060c2f937646500daee39e3b768",
    "signature": "0x4956bec6cc6badeb9fe5e85dc4b5ff448d1aa1f6b41c309367883fc3e9b72a601d2b968eed9a72e274dc54dcc3da29c3c2f0a1c2b4fb8bb0ddc9f793c7042e9c1c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}