{
  "manageEntity": {
    "action": "Save",
    "entityId": "816021406",
    "entityType": "Track",
    "nonce": "0xbbe808fa1a2330ddffee56dd818b85040874a7a44177733047fbf7043cc95dbf",
    "signature": "0x2f2afb93817a5759caee3b92751a773b2c198b64e66d3b703dc68caca4be4ae76ff7643930c0c881f94d98b25e8c090de272d2ee2fbc40c4c7d9d4c3bc69df3c1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}