{
  "manageEntity": {
    "action": "Save",
    "entityId": "1639328586",
    "entityType": "Track",
    "nonce": "0xc21a31433c69e9ceeb0fb6d975547570236f27282f8d23f1661c1f1e0ef10d96",
    "signature": "0x3139291b3385cfc2cfa7432e7bf3d3158a9f4efb083090de2f57833fabd3688a031fc7eddfdf47261738a309d8bc29a9e409f78503a82b350fcb29637f6d28581b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}