{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x22055ac329bb1df0dea43efdd7120a91091f7f85c7de8d3a3228ee8f5cc48090",
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    "signer": "0x2a5b15029f304A82df9aF6a3fA0851a5b8525800",
    "userId": "331206081"
  }
}