{
  "manageEntity": {
    "action": "Save",
    "entityId": "2037821195",
    "entityType": "Track",
    "nonce": "0xd7cd15aa4225cb1c0b3b6086a3d30ea03ae3f2785b7a6ccbc3a39a961231adec",
    "signature": "0xc05c6c8a968c8670af419724ee5c71024d5c6782e2f2a50755c26a686020070d73e0f954726c8762d90190e83e5a9d5e30b958f7b138b33392d2ffb75a1fff4d1c",
    "signer": "0xD9254B079e0e1571E56512C57188F2eec899054f",
    "userId": "854498636"
  }
}