{
  "manageEntity": {
    "action": "Save",
    "entityId": "1254984661",
    "entityType": "Track",
    "nonce": "0x23437d0013c0f640da50ac05cebf5ecc153ba28ed4771c776209fd0d2dd7a2dc",
    "signature": "0xf387bcef54426144af26eae7b04cc84c65605857a8c5648d43eea0b950d836944fee446274523bd1df73dd9fb98cccec1498d6db6674605560a5db8224b6ed201b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}