{
  "manageEntity": {
    "action": "Save",
    "entityId": "4281",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0xa6f8596581e35501566d3878c4a191746df845a75332f1475105d367c82516dc",
    "signature": "0x9f0cf1736006755daf3aee5a030e2ee83cc88a716e8b273ee34fa5a5d36f1e433f54cbd49659be42c66d0ad7a70183aab621f648963ff3b5dd8fe983cf4fe5e21c",
    "signer": "0x0fdbE0966d6f65E3DE225D16D06131c10d4F2b3e",
    "userId": "560630042"
  }
}