{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc4eca1b8ad222174d886c1e183e4613d5edd50ff7775e553f90be055fcc9017c",
    "signature": "0xceaef2e1532f0d696c5bbf44627e6d30a68128507c61f1c329d254ccf9dc601320a38bc97061d85e01cef76256a8deb877d3bb7fbed5747bcd67f8e649ece91c1c",
    "signer": "0x85716762Eec590d7cED7237cd3177cc25FA3f95d",
    "userId": "897051051"
  }
}