{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x984f3908a77cf021ed037438ff2ea16f76bedbd89774b45c347e39d4a3bad94f",
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    "signer": "0x633d9F446E645E4a4Da529CB996A34Fc6599F64A",
    "userId": "366722698"
  }
}