{
  "manageEntity": {
    "action": "Save",
    "entityId": "1075785",
    "entityType": "Track",
    "nonce": "0x539f932e053eee5ba2325fb9e3c7567b9777825d65da25ab282b54c169362ce9",
    "signature": "0xc38eb71be20ea07b52fd9595c69b99c49002e6bf8bd451e9a7aa7f5cbce14d967146e2d50d666c69bc443c8bd2862f23cfccdd7877649e2263bb58db8164c0631b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}