{
  "manageEntity": {
    "action": "Save",
    "entityId": "2086654821",
    "entityType": "Track",
    "nonce": "0xcf45991805f67991616f42411c17beec6490990ea6c8215146a2f658840874a7",
    "signature": "0xff42971e934a59762724be0b1c1ac1c8e162e875df112ebe5458d2b1c1714d0320239bfff33f273eb17c8fc72433e37bd9bc1fc17b71f8ac60dbd2292a3295141b",
    "signer": "0x45c4f1dcE13eeF476C74C5758696D56137253980",
    "userId": "824478223"
  }
}