{
  "manageEntity": {
    "action": "Save",
    "entityId": "1732001303",
    "entityType": "Track",
    "nonce": "0x5966215a96b75d79b2d4bd214872833d5b3c57b506d0f4bd87bbe59740e4dd20",
    "signature": "0x46b78b478ec8261e2e343b71becc9f2ba491d46154a8acdbf008d2cd8b61942978a11e75e2fcb520344a604b08229adca4036740c2bc26227b2cd17adb454f8d1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}