{
  "manageEntity": {
    "action": "Save",
    "entityId": "1764588423",
    "entityType": "Track",
    "nonce": "0x3c7cf9508b1a05ba329544ba8c28e578c43e432f3c28bd0156608810da30472c",
    "signature": "0x3540b422ef015e8d98e2be96c2786c01196fcd5f0e2312b371d5e6814fccce154e7a16df3051952e108818a3586eedc9575393858d9477307733c61eaa102c301b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}