{
  "manageEntity": {
    "action": "Save",
    "entityId": "764237269",
    "entityType": "Track",
    "nonce": "0x0a840e12fce48a68bfc986008acc7800e8d0b12221c9859ba03eb03807a62d74",
    "signature": "0xd63a566450fe1d001c8f8d27ea6de1ca51cc2a547452c7b1ed5f8a5612188a6b48ec9f0335181af90274bc3f826bf66cb4a1b4db11f99863c6d5230892ecdc251b",
    "signer": "0x5A6DCd6E22135e4225594900c17114A7dAD01964",
    "userId": "580576096"
  }
}