{
  "manageEntity": {
    "action": "Save",
    "entityId": "2119212222",
    "entityType": "Track",
    "nonce": "0x1d107636ca3aaf377c7b1a499a0aa7fe93ee7c28366e3fd76e916db146ccf380",
    "signature": "0x281a653c6b1e94334fcdd263084d8091c33750967a43e230f2f8c9309d4f67407a9ef1726c4eafcbd055332d69856ca246613b87dd2d27bedc8c342c7ffd111e1c",
    "signer": "0x1b2c37cDA8248bB03659377cbd309183c2292824",
    "userId": "306414"
  }
}