{
  "manageEntity": {
    "action": "Save",
    "entityId": "1769166706",
    "entityType": "Track",
    "nonce": "0x5ead69c6a8ef2aba49c3137cb3b7de9a5af18d45cd0295baee1f58be8466b548",
    "signature": "0x9f1c1ea290032df300d6ad548897062d2471d226303bd4f8efc8692ce9cdf9f63d7fe99910b993ce406bcf637628e91968328724c97bb5599eccf7f5b8d745e41b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}