{
  "manageEntity": {
    "action": "Save",
    "entityId": "1559783078",
    "entityType": "Track",
    "nonce": "0xcfd189d84d26e8ff22a7102519a5dd27e9e6de8cc2606eb70118e5fe41e3fe2a",
    "signature": "0x9eeda461ad08c69cdd62f7db059de7d1192fc69c936255faaeac219e41d5f20e41cb737ad24cfb67d80bbc45c8e4a2bef2b56b3e4364e7e47acb889d98307b9f1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}