{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x46e25663c3fa45688c52f37ba03a4a0aab49fc1e17523a26c02669542083660c",
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    "signer": "0xf0aE5dc768355f3F6FD6d36eC911c860C8904Fa5",
    "userId": "405896524"
  }
}