{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3e5c8e9821f82660af6b4b381e86b2667f56bfabbdeba19d430d92baf305844f",
    "signature": "0xc4a04d700071ecb5d92f0b135873d9b96fec4a9b6aea225368fbd1c328c0551525ce90778757aa8c6b483ca1a73bee4b5489c1dd358964a812a6dabd2911d6c51c",
    "signer": "0xA37F18aB158e689Ac6955f6767232C266f9f35b9",
    "userId": "498040175"
  }
}