{
  "manageEntity": {
    "action": "Save",
    "entityId": "1913140587",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xadb04f9852a4a33442bec178f32a41dddd9de10d9de33b85b85a31a0dafe6bfb",
    "signature": "0x9185a3d145b42edea1ceced8641c4f627011d0ebb41abb38d6f72bc369d369003c20b0fd637fe29b9352949e3c3a7bdac00abd4dac97d18337ff1812ab4bf8d31b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}