{
  "manageEntity": {
    "action": "Save",
    "entityId": "121333",
    "entityType": "Track",
    "nonce": "0x4d3b3ebf9f98256ae948eb27311ac797c497398a76f0b587ec16dc71191c9c88",
    "signature": "0xa54dc045dec41b40ee0fb74d45d1ff3b785becc4d12dc7594a003415b1b433a42d9c448872aed549b6f0b2102cefdbc7b5693a3726a90bd7c30e547275275d051c",
    "signer": "0x766d742Cc35188990Dc38CaD8006DEcEe3fAFed5",
    "userId": "353834"
  }
}