{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x0855b2e722ad4e6113f1fc54ce8f05aef304d914d82aa41036b4138410931e30",
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    "signer": "0xE00d35cDEf561168f54846Ecf996dD5dc728fF14",
    "userId": "702802703"
  }
}