{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2f2b94beddbcf75844832f27b90fccf14e907c3acebe49b4f817848bb8e6d75b",
    "signature": "0x7a2748d730d210a6bd625bdd704db2cdbf7f68e3b070919058a9855358e4249537db9b5da254ee86d217239edc4e200bea1e025d669c301d33d21108184edd8a1c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}