{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x5b7b83399f06da01522c8e77b88068d0e72689bc45c8d8e4ca46746be457e163",
    "signature": "0x225f32da9c56d6e38f4896b565f73b5672064324868a7732530efead7b60c6e0214e73aa642477dac64c2f4f11786fe3e1c8183c7218464a7360bc71704bf8d81b",
    "signer": "0x79cad6fb9ead68f49f798fbF40E190476FfDd0bD",
    "userId": "354227603"
  }
}