{
  "manageEntity": {
    "action": "Save",
    "entityId": "1370410269",
    "entityType": "Track",
    "nonce": "0xd0415bef618886c406dc908f364bc22ce83ff4e7430a449c46a32e6271e64aa0",
    "signature": "0x04472358606b88aa92cfc15e2c8498bf57c68ea77ba2dc3c2b095aa6220c99a265e7c84879999014c5574826decab3b92ed7eb9246425a003f91612d9d32d8be1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}