{
  "manageEntity": {
    "action": "Save",
    "entityId": "1743892398",
    "entityType": "Track",
    "nonce": "0x0bc11a33341cb2992de11ad06f8d0e382c424aaaf9a81f72b07bb529b69787cd",
    "signature": "0x0b8de60fe6497d8a7887cbed68b97f133ee87a42cee35c7d36ee78603b26e3617a6806f070006df426a2f03d29a0d6f0577d407cf453527c0bac1515b759c5161b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}