{
  "manageEntity": {
    "action": "Save",
    "entityId": "1054204524",
    "entityType": "Track",
    "nonce": "0x0de12d9ad9dbe07f12a1d4b49c0402578e2dc72125ead6ba729a784448530aaa",
    "signature": "0x411f2713c382209430e7837cdd351f22e1035bff1f18c942304b409a48f78ca656872153cdd4b88da9684e30c6c5190c0967264c250d13c7346d280b0e656a6f1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}