{
  "manageEntity": {
    "action": "Save",
    "entityId": "318923873",
    "entityType": "Track",
    "nonce": "0x12e1e2c3623d0f50fa8769a0f068247a69e7432a50adbc640745293f62a5dc1e",
    "signature": "0xf871044e9563ae948a52af3b0c68d219b5f72e108081e79f73fec9ddecd7ac6f3b77ee13b8bb8d8650510b70a1362b67263d3e2f966be998abc31cb662f85e221b",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}