{
  "manageEntity": {
    "action": "Save",
    "entityId": "242560072",
    "entityType": "Track",
    "nonce": "0x0be60cfacda2760d105238a47507f11320e3812cd92d744b2f333adcf17c1419",
    "signature": "0x5a988400dbed712c951c3674639ed1cfed4fa6917eaa9f44b6dfc1b9a7ffc0d016a65ab0e4a87761522996f117ab74f1fe4cb0e3959db920f75233800fa2921c1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}