{
  "manageEntity": {
    "action": "Save",
    "entityId": "816916676",
    "entityType": "Track",
    "nonce": "0x6c368f6ea0a8ac22d80369905db1997f7c4b1e589055d460021a52392241b2a6",
    "signature": "0x26c537de05d1d5085f8934dabfb2b462fc60681be39dc6ed9d237be9d76d03117d9dae0ad852fd6b0818ecd53486b16865542d2e79a5c7de2ed94c34842a0d521b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}