{
  "manageEntity": {
    "action": "Save",
    "entityId": "2064697670",
    "entityType": "Track",
    "nonce": "0x8fac8a89e29d0b0afa9dce0ee91d044fafc01854e95a7d01106ca1d4749d7a8d",
    "signature": "0x0b0f0b68b3ed5d66d091eaff1abcaf07a0dce8e825c9b01648bcad854524a1c658e0b3d6e6820ba86e9f9d21b8dff158fab5dabcdf96c9da7fae43f660b5182a1c",
    "signer": "0xDfAC0702040EaBd2d42e773014D4b014C0747D9c",
    "userId": "707937"
  }
}