{
  "manageEntity": {
    "action": "Save",
    "entityId": "1633087854",
    "entityType": "Track",
    "nonce": "0x722f329a1f9c361f5e7f1ba6541193603e671e0b69f9ceace439c3a463b26b44",
    "signature": "0xb4d57a045688112f88e95da228ef01f6c32b73d869ed140383ad1a23118beec919c2cef815e6c0b6496f475e0fceb494925c885cab94420d0cb39462419a32911b",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}