{
  "manageEntity": {
    "action": "Save",
    "entityId": "1741388514",
    "entityType": "Track",
    "nonce": "0x4735b4f6e9c638997b24848ef7d493d2aa8f85db981b1affc4133424486f6536",
    "signature": "0xd0776e868bec22f8edde74f235b3966c50b9bdabef4154d75ce87b9ae3a5db325293b5e9aeacccb183f0f638f2ae8660df37e260b582c40c0b2a5988df82dbfe1c",
    "signer": "0xE6a2533061175ED4c7f073A7BE3dc4189A4DE47E",
    "userId": "427249190"
  }
}