{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xabf03ebed0a5e4aac53168eb1bfb767ea7e84c496305982c7af4c6f2baa01bfe",
    "signature": "0xb4ac6b24e03cfeacd9692c655f98a12e95712f7697a2a6f431862ded1472a41b7e2e994c8727966bb8f7916f3b7e4a9ab5d199d4dac51f984c319ec1ccc614651b",
    "signer": "0x989faEfE658E0b6dF1793197b0De4137Cb1aDD3b",
    "userId": "554920508"
  }
}