{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5e2f30183236223fe59af2a9b9f24b26eed9ccc982d130be417a4dc50a563eab",
    "signature": "0x38e04a24c8ebe73142919df35352bd6d9a8b75fb655f325ab0ec37d67aab58ea331f21dd6e244e66c9403b404ffb8c615543d91c6973f146df261b457da0f6e81c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}