{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xd27d6a0bb4b6c44f5d3ee3415e953470b847e5d9c001354c0fc042555c7d8638",
    "signature": "0x659e1f546ce66968aa8a2b83e7e1525b7e64b7d221159cb97b8ebc637ba20e491aed9fdc07ed445222f9f468fe13abc9087d61e89e7c43208bf3bb0e93a75ce41c",
    "signer": "0xC13Dd1F7a6F4aC4fD7720539c67F0528DBb785ee",
    "userId": "267562371"
  }
}