{
  "manageEntity": {
    "action": "Save",
    "entityId": "718091319",
    "entityType": "Track",
    "nonce": "0x54c962f41cc9ff2927b23194f602913a97daf4f9460075684f83b7ad4c6ccd9f",
    "signature": "0xe61f329d1b7e7911859cf8f21ded3d6cb16ff6cfe940b6cc06470898cb72a9dc0d3535f9a66782cc68346576da22b351c12b6bf3db00913b8b296d876cb7e9eb1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}