{
  "manageEntity": {
    "action": "Save",
    "entityId": "718871006",
    "entityType": "Track",
    "nonce": "0x6bfe435dbd11d7e489bd09746db2f96a2bab99b623b012d3aa6def40ee404114",
    "signature": "0x37488da338502284a086d990c21a1816b18c7cd1e88b9d485350d3e36f6ff60f5fbe27757ff2f6e01b0befe8292aa8959e046e398223c64dabc9b5d14222a5021b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}