{
  "manageEntity": {
    "action": "Save",
    "entityId": "1919925508",
    "entityType": "Track",
    "nonce": "0xf96c6e5f0e9c9151d55af6e5d10397e7017b0f6dfffc68095d2181cc15dfc48b",
    "signature": "0x66f45ed2b7c2935871e80572ae3cbcac494f3010dca4667f771f8a058dccff83294c092dd5524ddb9c174f6f148316233de986ddc9b1f6167892cb148a38560e1b",
    "signer": "0x6754A920da1003d0904BdFf228A6E217Cd12bF5E",
    "userId": "105562689"
  }
}