{
  "manageEntity": {
    "action": "Save",
    "entityId": "2143520700",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x83a33735205b367f4b4236294e076de4ee8b10f47aea52cacaead485a6a8c56a",
    "signature": "0x0376c96a2324cabccd55161a8d5b4c2a3e51bc4f7e255eb14c4d9833f8ee056d5b92d90191ec078088f083991dfad701a96729f01a555a87ca289aa2ca8098a91c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}