{
  "manageEntity": {
    "action": "Save",
    "entityId": "1252917458",
    "entityType": "Track",
    "nonce": "1789967862447566111",
    "signature": "0xa8bb862fb7c3020ff03c4746054f38b4ba5e7e9a6630c2b235aca30d79e1653542e230e8470fe249a0e2dd51e3d9931891d8d12b2284894b5e1fe00ac2fd32bd1c",
    "signer": "0x9B241b1a6A99d662AE67D328e091Fc94faF23fdc",
    "userId": "881446128"
  }
}