{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047833273",
    "entityType": "Track",
    "nonce": "1789642331563295682",
    "signature": "0x2663d71d3a8909b6334df7d7f2d45e2695cdf3f4fe01c945919f6848c3801dbf7583e3ceed84fa642c1494507562a99900c433a47aaa47244699ca616f948d8e1b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}