{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xdb5b912d9dad20f0aca523107ab8fe4d534050e6a02e199eb54717e61c3e35df",
    "signature": "0x334896b06ef8b25f8556cea7e047e995f1498243e6685d290d5165493b6871af26e573e035763ddb9074d70187eab4ae8d2dea96f0f15cae48768d1ac56a56381b",
    "signer": "0x4A0635001f5d34a9227C2391A2a03972C23bcD44",
    "userId": "574030418"
  }
}