{
  "manageEntity": {
    "action": "Save",
    "entityId": "884614938",
    "entityType": "Track",
    "nonce": "0x3d8d234b839300d105ddd701766cb8caf8b1a0b6d0de03f43bfaa3d003e5ed4f",
    "signature": "0x514874103f7c0cfdac685c50d6cd09221c97da3d55aef0543f7cbd135010a83c1105695da1e92c10bd8955a340e716625accae315918adf6ba662dc8404e1ee51b",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}