{
  "manageEntity": {
    "action": "Save",
    "entityId": "1615766130",
    "entityType": "Track",
    "nonce": "0x69507d8556facdabe2171ea580163cc4f2ebfb032b907ca653165c0bde2f9880",
    "signature": "0x2d3612be018d456353e1855ebc4459d8f7432e9ea7f9f89f5048812325514e2468cbb1c7609b83ecf7354f1f4b77eae84a61d4447a457c95140dff3da21248411b",
    "signer": "0x283a6Fd0bE176865B404dfc3B2805D3a2701d62e",
    "userId": "484365174"
  }
}