{
  "manageEntity": {
    "action": "Save",
    "entityId": "1204068258",
    "entityType": "Track",
    "nonce": "0x87ceef0401ef020dfb4688a602d5c19b939aa79aa0ca56fa2826b099b94e3355",
    "signature": "0xe21792b5c6d76f21016e0ca3cb619077d0268e09eb21961deff8d2e21f1df6e65c263010cb7e86c6e0c8c351a8e78b1ced825678bc44f5d5065bf79d8728ee521c",
    "signer": "0x7425EdbFdF528603A88c658f4cf8B1396a8a77F5",
    "userId": "406225571"
  }
}