{
  "manageEntity": {
    "action": "Save",
    "entityId": "962648",
    "entityType": "Track",
    "nonce": "0xc04c275955b5aa44c6df42874acb179196e35e048b1735dfdebf5a944a1fbb07",
    "signature": "0xb739444b1b94cc604f144493be6e8757fae551521ae1ebe1341c0137598fe5dc522a14c25a01d078d4d44f55b8648dae5b3da5df2221eee33a105d593ecfd7331b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}