{
  "manageEntity": {
    "action": "Save",
    "entityId": "566059595",
    "entityType": "Track",
    "nonce": "0x96f70aed6202e7c0f9edfa26a59cb73d6016b8fa2772f5bff1048a89d1cf79c1",
    "signature": "0x46c2fabf86ad99338b8708691f3dbf7cfea43a3aeba884883e2e66128f3e43e91241293956f77c1013099b85a36a02cbd96cff2dda7f14ae3454fa08c87a675d1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}