{
  "manageEntity": {
    "action": "Save",
    "entityId": "1331133346",
    "entityType": "Track",
    "nonce": "0x8b7a786d8df6f4416dfe65d35995af191e657e2065d2d5bb441031bc97589915",
    "signature": "0xa4a71972f0f000eec1d6fc8dec38fd3ac9c9828603fccf2d9a03b4d74a29faf372a744347577102d4f20cfde9b14aa9d4abacbc317f16cb3d3cbecd305cab5ff1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}