{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x38436976fb010e4ff8de4f7ca3150c5021ef677ef00305a0176b1d804e9a2387",
    "signature": "0xf31e357013db4b834501666fbb3f655a4ca6d826a2d8de9cc1693623688d2a27404b704e0fa29884d9ab18eeab9f7d6a0c5878520b532dd52281da151fb226fa1c",
    "signer": "0x02aB27E032095c55Cc0aB50950Fc3460d0Ee5B1E",
    "userId": "508307433"
  }
}