{
  "manageEntity": {
    "action": "Save",
    "entityId": "2019871351",
    "entityType": "Track",
    "nonce": "0x5c5065aaa3568da92b7cf85dd6ae710a4e8a94b74709e2c4b84a4ad064d82cea",
    "signature": "0x8d3639f18afad4b0ca6031b6b0a0445ebd9fae5505d21dbbaf11916626ff26883f0edced0ae9a7cbf34a8b797a86c2d703cf6acee582807dfecd325bf4fcc8611b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}