{
  "manageEntity": {
    "action": "Save",
    "entityId": "1745866408",
    "entityType": "Track",
    "nonce": "0x60ef43bbe0ad2634eba931815234bbc4b3c7ad0ae39cf099f71c9282b8066f9f",
    "signature": "0xb8205f61b787c282c67f990363d7da0ad0a67e10c210850980b629fbd20814931df3a628a7657fc1d3081a2c3f1c1bea2620af0e217a8c315ce9bdb6205eab9b1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}