{
  "manageEntity": {
    "action": "Save",
    "entityId": "1350826306",
    "entityType": "Track",
    "nonce": "0x5984d95914eb70fc802dd9ab1d03bc46236e368eb77a5e05e0422721044a1c6c",
    "signature": "0x77d2af269d8908a7646ae3848fa31b94084c1b1f9c5619ec483aa1e7daf9a9a83d31a9883b9237edbef3cbe2e300af883ae74921a62a320da836c0ebc8a3b2261c",
    "signer": "0x03803b915E0AAee5C2c5aA3510FCc5b4DBb0FF46",
    "userId": "629975650"
  }
}