{
  "manageEntity": {
    "action": "Save",
    "entityId": "120712118",
    "entityType": "Track",
    "nonce": "0xf0b02b75d4621ec120357f4f5b6d3d2842d8997f2a20b31a4e39f1107afcc32d",
    "signature": "0x993532066d544b084d642d56cdc114616306ca73a763e01ee0d7f6f0e2474b291948fca67d63ba393dd883b1cdf10c242914579778327509ccca9bfefb9583df1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}