{
  "manageEntity": {
    "action": "Save",
    "entityId": "1107087",
    "entityType": "Track",
    "nonce": "0x3696f539c86cce32195c8a9ed6f5fc26591bf4e6ddb14f4ba2e557bac09bc336",
    "signature": "0xe8ad55f5344760707131d7cfe067fa636f0fed77257eb133ca5ff5fbbe6823854b1a130b2cbeb6c325760a5bfc1de242e91c80d1d7e7553a186e8d3d749848981b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}