{
  "manageEntity": {
    "action": "Save",
    "entityId": "1285251961",
    "entityType": "Track",
    "nonce": "0x3b8af6a008a47d5af5a7091c4547cef7bfd8a33f71d710cbec5f0f42b723fc2a",
    "signature": "0x8464c3c485dfeb5bdbf32e51fa22a465103ade462670d0dc2b04dd61ae23c95e37f982c5aaa1a9430053839186ff25fac19c8ded3d628cf3215d26c383fbc8e31b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}