{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x8dd45202ce033767ddd4756f843f357baab37050a7f7f98e04ba090b95a0b227",
    "signature": "0xf386dfd513471f90edc2b0338097fb6cde166efd8694bb089f154413ddca4cfa65bff3704479d17ad8101bb14e49dcc3c7827cef797857dd27436a3a24f363081c",
    "signer": "0x85105A2ebc4C2ce4A7814139985eA89254dA17f5",
    "userId": "170298194"
  }
}