{
  "manageEntity": {
    "action": "Save",
    "entityId": "1407608270",
    "entityType": "Track",
    "nonce": "0x1cba31daf9eb7d5022971c6dabd85fc49c43803d8ae240fd1da4932766cc3d46",
    "signature": "0x1e83b2e12e7d95ee12882acd9b8c8e286f5e947a010164a48f9728ea6ace7f294e499aed7f64440c0e73a865a1ac3c39dc680fd121d781a2cdfaeec3acfb9b9e1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}