{
  "manageEntity": {
    "action": "Save",
    "entityId": "373097337",
    "entityType": "Track",
    "nonce": "0xaa01b38d4479bb2b183c6ee91d8808d0144d068a4c628aefb85188cf14ec467f",
    "signature": "0x5ab23d30ba62046e840ecf2c95e72e67d1ef15bc3ddfa398d2d1a8373cc9c13f5afe84e87affc09ed60c74a949519aa27c43c0e49c864483bf6543efad5a701f1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}