{
  "manageEntity": {
    "action": "Save",
    "entityId": "1823005999",
    "entityType": "Track",
    "nonce": "0xea3e6b953d341f21869ccc3bcea376fcb1bf45e20a570a43e4aa0e5afc1b868d",
    "signature": "0x96c65bd1c1d975e0e42b2afdf1bc9c6439966d61ed18e79029b8a63246d69aff23aa16d2dc9da555b7168c0970983652a3a44ad501c717559e897d5f176d7c951c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}