{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x2cdab47840d06a85e065739fac79a95ca3a35f430e10156b641cf43c62a9b539",
    "signature": "0x45179059ebb1e77e504b1ddc81d3e7d171e9577380e411daac6db603e544c30e3c0e19ea0d3bf5dad741c992808e7bd423d4e739e7233387d9019e5a6136981a1b",
    "signer": "0xdd733EF8F0B56Aef1Fa5aC2486cc510dc6A1E6b1",
    "userId": "533845837"
  }
}