{
  "manageEntity": {
    "action": "Save",
    "entityId": "163570041",
    "entityType": "Track",
    "nonce": "0xa6a4722a093e4d64d09654b0e2761d85e6945d1d6ce829052512183eba1a7f84",
    "signature": "0x2016f45c020e2effc56455fa17352945f3909001dd946986857b102d4152e3421e4fb19d60e7e636a3a01acdde3ddae3482fec89598ff8d173aa8644344d24491b",
    "signer": "0x2bB7E42Bc944D023113eB9E0FC10079AEe4E50f7",
    "userId": "35744067"
  }
}