{
  "manageEntity": {
    "action": "Save",
    "entityId": "411980",
    "entityType": "Track",
    "nonce": "0xec19dce69a5877d2bd4e31ecec1f8fd9b0a797f204edf9ff070383b6732ed5a1",
    "signature": "0xe53b130881888213e565d3972fbdaf08b7982d4e1d2781402e84d8973e474fe332395bd096fe74ddff73413e89283fde1b40ed81704de4ad7a1d0939db2854111b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}