{
  "manageEntity": {
    "action": "Save",
    "entityId": "498796",
    "entityType": "Track",
    "nonce": "0x6fd9b4a5e743116e9b22c9d665df047425c71efdb05fae79060ac570f0613ce5",
    "signature": "0xb847d5273a6f4138499ee5d6580f0f0c70b14ff4b3e970293ab94e36101559a77c8302eaca1f06c5e3793b213702a8f719b8f8659d55c1967e1ed5295d7fbb3d1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}