{
  "manageEntity": {
    "action": "Save",
    "entityId": "954461",
    "entityType": "Track",
    "nonce": "0x43c3cffac40c07833b7f1cbf20b891e5479e85c422e977e3a32a53b97ebc8c01",
    "signature": "0x2dd48d2e2427527b1f69056d9f54ff423780407d4d5bd4fc30651f49290480a662a3081f039e9f76d1daa32862fc44e3944b83cd86078f5bcf46a9f0a487a7161b",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}