{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x3deb2a6314002934d6cfaec5186e4054511e5b1bdf19fecb7165aba9d3b4c32d",
    "signature": "0xe86e26b2e0b058c2fbc8cccacfeedd215750aeaf6e122cc77a975f26bd6e4f9624ff99688f855f37f7233a7efeeff6267c20c4ae6944d7675de44f65528dd3c31b",
    "signer": "0xB70dc84F60a47517Ce9fd5569c3c7c1C1a7a1ad0",
    "userId": "760656708"
  }
}