{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x28a5e431863a5b1aa5014d5944ad6311eb2bea7af3e652c088f17f01e65e2830",
    "signature": "0x9044de892e37760a48c0dd3cf93abc417be822d987362c6075925b1be69ac1200e2787e0ee8a5ec56e23bd53e6f6f6d4dd748caf5fbffa6eaca28ba71ff1cd361c",
    "signer": "0xfE3962986f8B766F3A47Af7237a1dc627a839F94",
    "userId": "961349884"
  }
}