{
  "manageEntity": {
    "action": "Save",
    "entityId": "579784249",
    "entityType": "Track",
    "nonce": "0x727c2c04b745f493a6f32c6e87dfe517d14847c582bad7b38cba2f77ccf96c9b",
    "signature": "0xc622d432bedb7345e8bf186aae497252f3f6245a4bdd104ae87403bf73365fbb5e6503223fda8b36918e4a2859a4daae2c717c39bc015fa8c591f56c2ca063d61b",
    "signer": "0x8D4435Fd18F8E4D969FCB3b38e10372302841e44",
    "userId": "595763143"
  }
}