{
  "manageEntity": {
    "action": "Save",
    "entityId": "762234",
    "entityType": "Track",
    "nonce": "0xff64c6fdfb3cf02df7177c7b7aa66dfab4eccc7424b61869f4a996f73681e3dc",
    "signature": "0x70f9776854871a02eb9d5faa11d947ef143a324c7ee304423de0e38bfbb14a1b6e02e8521ff2cdc4c00d1ee1423115351e62d7d673a33ebd71da8f20269b9ae01b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}