{
  "manageEntity": {
    "action": "Save",
    "entityId": "1398007808",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x45e03e2fc4d527ef4bcaed58d984dbb03092b046b3d3985a060fc3729930e8c0",
    "signature": "0x29b6fbbefe31a82f3b3079a9d989e040c5522571ac63b0bff9961ef7660eed916fb83d64d178414a6f4731f70b06b8e39e4e6c171698e083e15e273e159d1a141c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}