{
  "manageEntity": {
    "action": "Save",
    "entityId": "2003902865",
    "entityType": "Track",
    "nonce": "0xe2755017632f715e7fa6944bd20ef82e94e907eade756ec98d8b2d028de007a7",
    "signature": "0x91de88498cfcf3dd276fc3fc0ed833e350d376fe8d9c462c46967c1449d00e84247ee0ffaf52c58ac4bd43713e1ae4400821e7437197dede9d08748a9bda050c1b",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}