{
  "manageEntity": {
    "action": "Save",
    "entityId": "1165815717",
    "entityType": "Track",
    "nonce": "0x9a757b550419c2f9d620119609be4944004f8da34009fa5ba4de5c95489848f5",
    "signature": "0x559b20591d91fce9fe4191d73a77d8661c3d9513bc8f01f45c309add4a354af04ce8b3955d01cf69c1c88ff91c517a2e74d41d35f786d4f2a121bc1e9228c9f01b",
    "signer": "0xD967b68365738013c9197659aAb46EB73a488080",
    "userId": "488430169"
  }
}