{
  "manageEntity": {
    "action": "Save",
    "entityId": "1738810558",
    "entityType": "Track",
    "nonce": "0xcbd94daccbd89a2f5df6265b3b3d7d7716564c132ab6c5860ba5f31175339f86",
    "signature": "0xff535ec2ff6e0b0f419fe2c45db235370e89e8bdcb26e4cdf9caa0f46d2617e5320ae358766d2aeabf00d66da9d4b17757cd8d8f12cd1eb6a12be83a213d8ff91c",
    "signer": "0xc97A6025Ad8c7Ba1a35Ef7E3A3b88ABc8b2013BF",
    "userId": "666092734"
  }
}