{
  "manageEntity": {
    "action": "Save",
    "entityId": "169637455",
    "entityType": "Track",
    "nonce": "0x022ce23b9c13bb296796522f0eebdc0cd99ee7c725f2d99b5a204a0fda63f138",
    "signature": "0x863062c128b245382d5d22c8e8d8bde4fbb88847281dca211892838ef2424d6177dfe6d708acb93889ff3725dff4c32284607a28380e3d306045b883f91eb57d1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}