{
  "manageEntity": {
    "action": "Save",
    "entityId": "182787",
    "entityType": "Track",
    "nonce": "0xe01dc72fe0ab9bf1f5ffbcf76d3b2a883feb84a6c18548b4610c097226e9bc68",
    "signature": "0x576d2ad8f89437d03faa251089a8d63b94804d8c5156a408a3b7398da60acf1e77589296c4c27e03daa2534359ef0241d5248b07b82902166f737fa4180bce2d1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}