{
  "manageEntity": {
    "action": "Save",
    "entityId": "2078733123",
    "entityType": "Track",
    "nonce": "0xe9b726047b8e2065c981f4d87dbcdea6a25f96f41b5fbd7d7dfa93049bd8c258",
    "signature": "0xadf844cb45a93781a32896c745d473de08862ce87aca74854977de6f8016a05b17f87da5ee3365e126469175626db05470611336b83abf85b898c10e56963d431b",
    "signer": "0x4ac23dCFa73270D0cdFeE7D7409959255f83fac5",
    "userId": "21603383"
  }
}