{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8d78f5fef4db10839d2bf0a290d8c50cfe7d1bd49d43427ec3b5bcfbe8c4205b",
    "signature": "0x769f34462a87cb2bfa9f65060a580311eba61452833337698ab29486996b7b65487a16298c3d10b519e045321ef0e88bb52e03a7f1a8cb5d3b1935ff7961bfbd1c",
    "signer": "0x9FA61Ea6a57cAA57a0FBc08250a84C3b6765c9bC",
    "userId": "298768416"
  }
}