{
  "manageEntity": {
    "action": "Save",
    "entityId": "123980303",
    "entityType": "Track",
    "nonce": "0xcdde5889cf414af15e4b6e1a1b18b75274c5084dc809970aa6e14d063fcd775b",
    "signature": "0x4b9e4bd2446be64cfaab58ea789997af3fce65390a62e73c63c22b5a6f807a1174342af0b9ed6a65ed9559ca8376f4887aa85102c70d906c2c0274c92d9dfda21b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}