{
  "manageEntity": {
    "action": "Save",
    "entityId": "62025",
    "entityType": "Track",
    "nonce": "0x7c139b11dc8b62c45124574a9d4ac9f75d42fefe696bcb45bb2b177348747303",
    "signature": "0x9dfbc8c0eb88b7fd86a78fffdcc2d4cad8aa9b54185f57380633dd544ab5ef8b08a433cb4dec08778a166bb7a608d102d09108f87dba89f977c5775c143d0d2f1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}