{
  "manageEntity": {
    "action": "Save",
    "entityId": "1008030",
    "entityType": "Track",
    "nonce": "0xf51398115a7032b8f93533c6dcb793d7a12c1502fe9914e38aea096b4a55e898",
    "signature": "0x72ffbf36788dac0351bbd16776724ce1c932cf45d183f66c61ff1ee179a23ce22dfc4f397f04f8f7e93d099ef28759aac780489458bc97f376d9d85a086bb7d81c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}