{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x821517a741535321f79fddfc73cd9fce4baa9f11032a06112c36d72b452de8b9",
    "signature": "0xdaf5ebab25f937d36a6f74881c4ba2310b0ecc3b18e0ffe3e3f1fe9988a0c52c3f67dc65f8a6f7ba8e8060d9f9b045e356d745031c922f5a9483ec4c70d3d25b1b",
    "signer": "0xD789D7A758b03Dd9Cb2a515Ba006C101d295420b",
    "userId": "752417560"
  }
}