{
  "manageEntity": {
    "action": "Save",
    "entityId": "1225779747",
    "entityType": "Track",
    "nonce": "0xd09611681a9ee9941e0c51beec1bdd01c920fcdbd42e5b52bc48396dd6e14c85",
    "signature": "0x5521b40e51669cfff4e3df70857e9b4178af1a99f0f513123788598569e0f045258e46bb6f027e50e71f4efaa9eb6463f5cd4db0c8e49773af4b1abe86f5d00f1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}