{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xc5f2c68d0b8b54d8567f72a30cc02e8e808774b026ef855d3519777b395e1183",
    "signature": "0x34d80ef92287bf3fdfd19a81a8fb0e87015d5f7c2c90bbcbd24cccf7400c4b2153a5c1548b7f2fd43072d0794324e52479b198fdee893f8f6851dd83f97d332d1b",
    "signer": "0x39544F27E42b8562e01896e12786D9603f08d22D",
    "userId": "92620005"
  }
}