{
  "manageEntity": {
    "action": "Save",
    "entityId": "1965814161",
    "entityType": "Track",
    "nonce": "0xf25347abafac895ee7a7da29383f12f26a63f416d6601de74ce58ab83a2df35b",
    "signature": "0x9c61405bd7cd09d9fc3553b4d95a28dc3651af870f9b0c7ceec9bf316e2748d874c392456805f1d7dc98d979d8dfef683df9554e107b829acbfed824533124291b",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}