{
  "manageEntity": {
    "action": "Save",
    "entityId": "1681520406",
    "entityType": "Track",
    "nonce": "0x83a2c837e10ea257ba4aa810181e1495fcda2380c9581ea6f1c9de04cf97493b",
    "signature": "0x950abd194d8b0ba931ede5f3c301e147626c07f3c6f77a510113d7577f1b7753538d272be1af7113582d39f482af63ad22276de57f4b31b4639a1aac393524d61c",
    "signer": "0x34Cea527C1dc0575a5B686515aad0Bf8F3b5f97E",
    "userId": "13589021"
  }
}