{
  "manageEntity": {
    "action": "Save",
    "entityId": "1177984685",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8192be3ab6c04383b38ee934dcefaa3bbcbcf627f5f2c022032cabafe2cc7e6b",
    "signature": "0x6e352375a6e06dd5e8693a4d12376c80cdbf774278ee82132854ccd8b28dc6991ba44e04512265674171b67e1fac6fd317e620ff0bc1b4ce46fd3b2db52dad601c",
    "signer": "0x7b52e6AA15Db4Fc3A84AFF2b12e5B8B128eA8610",
    "userId": "808512351"
  }
}