{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x589a0f2c5026ed1d51eb46dcae7a14da5e181d736741e3344fd77e0e03305651",
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    "signer": "0x7597c344f2cA84759691973cED6234c95796DEf5",
    "userId": "548675890"
  }
}