{
  "manageEntity": {
    "action": "Save",
    "entityId": "693643473",
    "entityType": "Track",
    "nonce": "0x2c83f3a1881ed230f9707e85d90832302fb64989db5393b46deffe63f14a72f4",
    "signature": "0x0f43045095cd9c4c3199cc5e612f61c77d29373a22fb07f2a4ddcde330d33aac4afaacc3fea224e5601560219dd35d434292cedd9cd9db36635e8fbe287decd71c",
    "signer": "0xA58E9DB71bd7769eD0ce2E3B8570c246C1157776",
    "userId": "636373789"
  }
}