{
  "manageEntity": {
    "action": "Save",
    "entityId": "630245239",
    "entityType": "Track",
    "nonce": "0x326946bc814afc45633d91b5b33619cb04f94b46adf6a7943008557027368378",
    "signature": "0xced07e41ed72385e0809fc1f35cdb99e722361b5209c9faa7615bde8e76cd5a84d92380e5490b9c9e2cf9f7f145fff1cd303e9569b66be290f5b393fd388ec961b",
    "signer": "0xDD3Cb841c7f19ec5581F8E2b14d6f7a58B92d0F7",
    "userId": "582464754"
  }
}