{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2ff0b8961aaa0e056cefd6768ea73800a6237b0e218cd081c86e71c91b51cfdd",
    "signature": "0x4c53fc866a918419fbbcfcf2f389c523e341833a451589122f2b3635ac346d940f2d9457767fddf09a321e5a8c8f8e75477c4a67ee7382c817e3679b3dba80731b",
    "signer": "0xdc774bc3dDe14Deb5FFf307E6B1BA0fC77D1243E",
    "userId": "274667836"
  }
}